|  
 Dr.  Katharina Schmidt, Deputy Chair of the Roswitha Haftmann Foundation
  Laudatio  for Sigmar Polke on the occasion of the Award of the Roswitha Haftmann Prize  2010 on 29 April at the Kunsthaus Zürich A  Path towards Sigmar Polke’s Church WindowsImages in Stone, Glass, and Light
 When  asked why he was interested in painting on transparent silk, on diaphanous  fabrics, Sigmar Polke replied that he knew all about stained-glass painters—St.  Luke had taught him everything about it.1 With this charming quip,  which granted him cover behind the patron saint of painters and evasion into  legend, the artist once again pointed the viewer towards his own path of  seeking and looking.In  physics, transparency (adj. transparent, from Latin trans—through—parere to show) is defined, in simple terms, as the property of certain materials  to allow for the passage of electromagnetic waves (i.e. light). In everyday  life, it is commonly understood to mean a material’s ability to let light  almost entirely shine through it, as in the case with glass. Yet not even pure  translucency will guarantee the flawless passage of an image or a gaze. For  just the slightest rough surface or particles inside the intermediate material  will diffuse the light and impede the clear transmission of objects on the  other side. Further optical properties such as reflectivity and absorption also  determine whether a substance is transparent, translucent, or opaque.  Translucency describes materials that are only partially permeable to light,  allowing the human eye to discern little more than darker or lighter patches of  what is located behind them. Such materials reflect the light striking them not  only on the surface but also from deeper layers.2
 The  degree to which Sigmar Polke attaches fundamental importance to this complex  interplay of light, material, and perception is manifested in the titles of  several series of his work such as Transparent, Laterna Magica, Amber  Paintings, and Lens Paintings. And even where this is not the case,  he employs a plethora of optical effects and visual phenomena that point in  this direction. Brilliance and fluorescence, diaphaneity and dullness, moiré,  luminescence, iridescence, or sheer transparency—such terms only hint at the  wealth of experience many of these pictures have in store for the eye. Yet the  different attributes of Polke’s media should not distract from his primary  concern of exploring “transparency” in a metaphorical sense. With a  penetrating, inquiring mind, he targets all that is too easily seen through and  that which is not seen through at all; he scrutinizes clarity and opacity,  inspects the obvious and the disregarded, peers at the surface and into the  depths. He is unremittingly interested in both facets, in the either as  well as the or, in the simultaneous possibility of opposites.
 In  the 1960s and early 1970s Sigmar Polke soon developed a style of his own,  unshackled by convention, which enabled him to explore and transmute the full  visual spectrum of everyday culture with evocative gestural markings, blotches,  traces, and drips. For him, all means were legitimate if they allowed him to  superimpose, weave together, or intermingle motifs and multifaceted quotations  of words and images on top of the farraginous patterns of the textiles that  came to replace canvas. The more dense and delirious their layering, the more  urgently they challenge us to keep our eyes trained to them, to seek and to  question correspondences. Observing pictures means diving inside and sounding  their fluctuating and frequently fathomless spaces; they also never cease to  captivate us with their charms.
 Polke’s  dot-screen paintings—the consequence of his rarely interrupted preoccupation  with halftone textures—also induce the eye to explore the underlying ground,  which between the enlarged dots glares with emptiness. The reality feigned by  images that are simulated by dots and pixels is unmasked as illusion, thus  revealing the limits of perception and of the extent to which it is shaped by  pattern.
 When  Polke’s interest in the early 1980s turned to color, nature, and its materials,  he investigated minerals, metals, pigments, and ancient formulae, the states of  dampness and dryness, of fluidity and solidity. He mixed, cooked, brewed,  grated, powdered, heated, and allowed materials to cool down again. Hermeticism  and alchemy draw attention to substances and the ceaseless transformation  inherent in all things. Luster and reflections impede our visual access to the  images, to nocturnally iridescent spaces, or to realms cast in dawning light.  Translucent, glinting or dull—in the course of being poured in numerous coats  over the large canvases, the yellow-tinged synthetic resin evolves into open  terrain, unbounded on all sides. Only by shifting perspective can the viewer  gradually find a way inside. The painter prizes the quick gaze, yet he waylays  fleeting scrutiny with traps. Constantly changing hydro- and thermo-sensitive  images are enticements to return.
 To  achieve greater transparency, both in physical and methodological terms, since  around 1988 Polke has chosen to work on translucent supports: polyester fabric  soaked in resin.3 The fabric also renders the lattice stretcher  visible, integrating it as a component of the painting’s composition and  pictorial idea. The motifs are now derived increasingly from the history of art  and culture and executed with graphic linearity, free-flowing gestures, or in  halftone dots; they complement one another against the pellucid ground, as if  they were meant to be conserved. Discoveries from the world of myth—phantasmagoria  and curiosities—also crop up, yet alongside them contemporary events retain  their virulence. The more the works manifest their texture, even if just  creating a clear view of the bare wall behind them, the more fragile they  appear to be. The resplendently colored Lens Paintings overlaid with  vertically raked lenticular screens4 once again dramatically raise  questions about how we see, what we perceive, and how much the viewer is, in  fact, part of the picture. Depending on one’s angle of vision, what one sees  always appears to be different, whether plausible or grotesque, since the  refraction caused by the grooved screen and the varying thickness of the  lenticular surface create distortions and mutations.5 A wholly  meaningful view of the image can only be gained from certain perspectives.
  The  Commission for the Grossmünster in Zürich The  task set by the Grossmünster in Zürich was to design all the windows in the  church aisles. Rather than adopting a stylistically uniform solution, Polke  opted to create a dichotomy by treating the five same-sized windows to the east  of the two portals (two at the northern and three at the southern end) with  figurative images based on themes from the Old Testament, while giving the  other seven abstract designs. This idea provided a certain degree of  homogeneity in the rear section of the church with its various types of window,  which seemed to call for a counterweight to the deeply resonant colors of the  windows in the chancel by Augusto Giacometti, as well as 
                    offering the possibility of union in a spiritual sense. The  Agate Windows  Polke’s  extraordinary choice of agate for the panes produced unique results.Treasured  like alabaster since antiquity, this resilient gemstone had never been used in  this way.6 In 1986, making reference to the cosmos and geology,  Polke had already incorporated a meteor and a crystal into his concept for the  Venice Biennale7; later he exhibited gold and a block of jade8,  as well as combining rare amber objects with his Amber Paintings. The  idea came to him when he noticed a pronounced similarity between the cosmos  pictured as a disc in an illuminated manuscript and a slice of agate. The  frontispiece of the Viennese Bible moralisée9 shows the  Creator with a compass shaping the universe represented by the medieval  illuminator as a series of concentric circles. With the earth at the center,  celestial bodies rotate against a nocturnal backdrop, while water and air  revolve around these in rippling pale green and bluish-white seams.10 Anyone  entering the Grossmünster through the northern portal and turning around to  behold the interior will be taken by surprise. For, above the door’s lintel,  where, from the outside, no more than a slight, gentle pattern had been  discernible, one is now stunned by the sight of a scintillating image, an  intense interplay of colors in brilliant arrangement. Only on closer inspection  of this assembly of blue, green, and a purple outshone by bright red, of brown,  beige, and gray, does one begin to recognize the composition, its order and  symmetry. The upright central division bar in the semi-circle of the former  tympanum11 acts as a mirror axis for the round and oval sheets of  agate. From the middle of the base loosely ordered rows fan outwards, reds in  pairs compete with green sequences, glisteningly white crystals puncture pools  of cobalt blue. Some of the stone slices owe their vivid color to artificial  treatment; since the stones’ contours barely appear to have been straightened  for fitting into the lead cames that hold them in place, one could  almost imagine them to be part of a naturally found conglomerate. The presence  of two oversized, somber, blackish slices of agate obliquely peering out  through this bed of color transforms the whole into a stony gaze cast by a  hundred thousand eyes. A demon. Is it protecting the exit? Or standing guard  over the entrance?
 None  of the other agate windows makes an impact quite as strong as this, but each  one exudes magic of its own. The narrow slits set inside the deep embrasures of  the tower façade’s thick stone walls allow for almost no other solution than an  ascending sequence of rounded forms. Whereas the bright red in the northern  window and the intense blue in the southern window echo the color of the  Apostles’ gowns in the nineteenth-century windows in the nave, the remaining  windows are dominated by the natural tones of different agate varieties,  accentuated by the occasional synthetically pigmented blue specimen.  Altogether, with their variously regular/irregular structure, Polke’s agate  windows are clasped within the masonry like a precious mosaic, sealing it as if  the massive stonework itself had transformed into luminescent matter. Indeed,  the agate almonds are translucent only when sliced very thinly; their  diaphanous crystalline layers refract and filter the light. They thus glow as  if emanating from the depths of time, radiantly manifesting their primeval  substance.
  Son  of Man Unlike  the agate windows, the figurative motifs from the Old Testament are designed in  glass and full of light. The contrast of the first of these, titled Son of  Man, to the closest agate window could not be more abrupt. The window is  conceivably a reference to the second day of Creation when light was divided  from darkness.12 Here the image is defined by the stark opposition  of black and white with rare passages of intermediary gray. Human beings are  invoked in the form of life-size facial profiles.13 Four lateral  bars divide the lancet window into eight rectangular fields, in each of which  Polke has repeated the reversible figures of so-called Rubin’s Vases14;  in their vertical sequence down the center of the window they form a column of  Janus heads.Rubin’s  reversible image is created by the entirely flat representation of seamlessly  matching contours of facial silhouettes and vases or goblets, allowing one to  perceive them either as figures or as ground. But they cannot both be perceived  simultaneously: if one concentrates on the heads the goblets will turn into an  empty background, and vice versa. In this window the focus is on this  alternating either/or, on ambiguity, on the moment of uncertainty. The  silhouettes, having first been electronically modified and de-individualized,  equivalent perhaps to the four basic types from the doctrine of humors, determine  the shape of the eight goblets: the elegantly sculpted tazza at the top, the  sturdy trophies and chalices in the middle, and at the bottom the spindly and  somewhat flawed, lopsided specimen—almost a reject. Polke’s view of the Son of  Man is evidently tied to his idea of the “human subject per se” or “all  humanity”—as portrayed in halftone dots in his work Menschenmenge (Crowd,  1969)15, in which the figures stare expectantly and stonily upwards,  as an oppressive mass. In some of the panels, the heads appear to be steadily  approaching each other, only to draw back as the radiant cup with its wondrous  aura surges between them. This pulsating phenomenon has a mesmerizing effect on  the viewer. Created by tracing the contours in fine layers of black vitreous paint,  it never ceases to disturb and fascinate. The human image remains ambivalent  and essentially somber, a vision from which the artist does not omit himself.  Nonetheless, the window shines in “white brightness”16 since the  scattered light from the profiles and the goblets emits a diffuse, somewhat  dulled luminosity, while in the threshold areas diaphanous black glazes stand  out with engraved precision from the white, or merge into the dark areas.
 In  the arch of the window, Polke inverts the constellation. Here, borne on beams  of light, a shadowy, delicately contoured chalice floats on a bright ground.  The suggestion of a slightly lowered perspective adds to the cup’s spectral  aura. In Zwingli’s house of worship the painter adds a deeper metaphorical sense  to this more settled culmination by alluding to the participation of all people  in the shared symbolic rite of receiving from the eucharistic chalice. Yet the  window’s disconcerting impact on our perception reminds us that these signs  remain ambivalent, affording a glimpse of an eternally elusive mystery.
  Elijah  the Prophet In  the neighboring window, dedicated to the departure of the prophet Elijah,17 the central motif stands out distinctly against the background. Polke adopted  the decoratively illuminated initial P from a French twelfth-century  illustrated Bible which depicts the prophet’s tumultuous ascension up to heaven  in a chariot of fire.18 In the ornamentally rendered circle of the  initial, one can make out Elijah in a war chariot. The shaft is pointing  upwards, two horses are stamping with burning hoofs, everything is ablaze in  primary colors of yellow, red, blue, and green; even the spokes of the wheel  are flickering with fire like burning blossoms. With white hair and beard,  Elijah is passing his mantle with his right hand to Elisha. Entangled in the  arabesque foliage wound around the upright bar of the P, Elisha’s outstretched  arm grasps the token of the prophet’s gift; with this he is assured of the  “double portion” of Elijah’s spirit.Polke  shortens the exaggerated tail of the initial’s descender as far as the figure  of Elisha, and mounts it in a lead came to give it an emphatically heavy  contour, as though this extraordinary event needed to be preserved within the  letter. Magnifying the letter to fill the breadth of the window, he places it  at the center so that the vast P appears to be floating in the sky. The  division bars play a relatively minor role, whereas the circular forms at the  top of the window echo the rotating, ascending movement of the chariot wheel in  the Elijah medallion.
 Compact  and bright, the window is made of thick glass, both in the initial and its  surroundings. The coloring for the black-and-white copy of the page from the  Bible is entirely of Polke’s making. Echoing the brush strokes in the original  miniature, the blazing activity staged inside the letter P consists of colored  glass strips, coruscating as if it had just burst into flame, while Elisha  withdraws into the earthly shades of indigo violet, green, and black. The  surrounding surface is covered with a mosaic of vitreous pebbles. From the  bottom upwards they gradually grow paler, as aleatorically quickening moments  of red and pink intermingle with clear blue, joined here and there by green  and, near the P, a somber violet; beneath the arch, spots of golden yellow and  light red appear to open up the heavens. Each hue was individually produced,  each element melted into a plano-convex lens and set in a white mount, also  made of glass. In sunlight this creates a unique effect: the entire sky is  mirrored in each single domed surface and, as though charged with energy, the  air carries Elijah far aloft into another world.
 Polke’s  interest in supernatural phenomena and anything that poses as such has  invariably been marked by ironic and irreverent curiosity. Levitation of all  kinds, even involving his own body, has constantly intrigued him. In Sternenhimmeltuch (Starry Heavens Cloth, 1968)19 he discovered his own name inscribed  by celestial bodies in the cosmos, displaced into the firmament as was so often  the lot of heroes and their victims in ancient mythology. Can the prophet, the  visionary, be read as a synonym for the artist? The dramatic moment of  valediction and mourning that also resonates in this window ultimately appears  to be suspended, inverted into a mood of wonderful serenity and hope. Elisha  will assume the goatskin mantle of Elijah and with it wondrously divide the  waters of the River Jordan.
  King  David Although  the Bible later makes no further mention of the harp-playing with which the  young shepherd, David, dispelled King Saul’s evil spirits, the image of the  priest-king as a musician and poet still predominates in Christian iconography.  In the ecclesiastical thinking of the Middle Ages he played an eminent and  exemplary role as the direct predecessor of Christ, as one of the just persons  in the Old Covenant, as the psalmist, and Old Testament prefiguration of the  Messiah. The musically gifted psalmist stood at the forefront and was  frequently depicted as author/composer in psalm books.20The  Biblical figure occupies the entire surface of the window in larger-than-life  dimensions, its significance emphatically asserted through its monumentality.  David sits enthroned in the pose of a sovereign.21 Angled slightly to  the right, he clearly gestures with his hand in the same direction, yet what he  is pointing at remains obscured.22 His arm itself is partially  masked behind the dazzlingly white, appliquéd instrument. The impression  created by the king’s foot cushion set at an angle to and abutting the lower  edge of the embrasure is that he, whom God would not permit to build a temple,  seems to have been dispelled into a kind of antechamber on the far side of the  crossed black division bars. Besides the light areas denoting face and hands,  his royal attire—the decorative armilla, a magnificently hemmed robe, the  embroidered shoes, the cloak draped in sumptuous folds over the knee—introduces  white accents textured with black glass- paint stain hatching into the  monochromatic green image. The glass in the window, produced especially in this  bright but saturated green hue, consists of unusually large individual forms.
 That  the painter was not concerned with presenting an idealized image of David—the  Bible similarly creates the impression of a contradictory figure—is evident  from the expression on his face. As though he were peering somberly through a  peephole, camouflaged in the green expanse beneath the arch, his head emerges  within the disc of the roundel; a thickly bearded warrior with long hair, the  instigator and hero of countless battles who finds no peace from his pursuers  yet spares them nonetheless. In lieu of a crown he is wearing a cap and  cockade; his eyes are screened by small round discs, his gaze concealed behind them.
 Can  this image be interpreted in any other way? As the “green pastures” of the  psalmist, perhaps?23 The supple linear contours within the drawing  bring to mind fertile plots of land, lush grass-covered hills, rugged gullies  descending onto blue streams. That the same channels circumscribing the  monarch’s head shimmer red, even if almost indiscernibly so, is unsettling but  it also fits the picture.
 As  one of the oldest known musical instruments, the harp has been attributed  magical and healing powers since time immemorial. It is as prevalent in Nordic  myth as in the grotesque depictions of animals in the Middle Ages. In Polke’s  David window it is rendered in a Celtic form and defines the center of the  composition; yet its addition seems remarkably alien, a flat and white  intrusion. Is it meant to disrupt? Or to allude to a different reality? The  contours of David’s figure shine through the stylistically discordant  instrument as fine fissures. Age? Deterioration? The flat monochrome areas of  green signal the king as the bearer of hope for promised glory, proclaim the  psalmist as the guarantor of art. Precisely this vision of him is accentuated  by his timelessly stylized attribute, the harp. While supported by David’s  body, it looms forward through the division bars, a white and decisive  presence.
  The  Sacrifice of Isaac The  monumentality of King David is followed by a shift towards a relatively  detailed composition, again with the lancet window divided into eight fields of  equal size, of which the lower four, the top four, and the panels beneath the  arch constitute three distinct compositional units. From a simultaneous  narrative illustration of the biblical account,24 which was  available to Polke in black-and-white reproduction, the artist selected several  salient details, reworking them into ornamental designs. In the four lower  panes he has set two motifs in a criss-cross arrangement: bottom left and  diagonally opposite are two rams in red silhouette standing on a pink ground,25 each facing inward towards the center; shaped in enamel and still embedded in  underbrush, the body of each ram shimmers with a bluish hue. The animal’s  duplication is a reference to Leviticus 16:5–28, where it is claimed that for  the ceremony of atonement Aaron should sacrifice two goats as offerings, one to  the Lord and the other to the demon of the desert, Azazel. The other motif,  positioned bottom right and diagonally opposite, makes a brutal impact. Polke  has isolated Abraham’s arm and hand, with which he has seized Isaac by the hair,  mirroring and inverting them to create two sets of hands clutching two helpless  heads. Due to the small spherical lenses used to model the figurative elements,26 embossed almost like a bas-relief, the refracted light creates a troubled  surface in keeping with the dramatic subject. The purple hue of Abraham’s  sleeve complements the dark green of Isaac’s tunic, while his yellowish hair  and white face shimmer wanly alongside the blood red of the ram—sacrificial  victims both. Similar to a windmill, the images rotate before our eyes, a perpetuum  mobile of violence. Thus Polke extracts key motifs from a mythological  narrative and its illustration in order to lay bare the quintessential core  through a process of ornamental concretion.For  all their compositional elegance, the four central panes simply intensify this  impression of violence. Abraham’s figure in three-quarter profile with a drawn  and shortened sword is mirrored along the diagonal axis of each pane so that—in  allusion to the promised number of his progeny—he is reproduced eight times. He  is confronted with himself four times over. The blades of his weapon mutually  block one another and fuse the supple physique of the old man into a single  filigree ornament resembling a Greek crucifix; the design’s negative forms also  complement one other to produce a cross and rosette. This strangely exquisite  emblem, a blend of a wheel and a cross molded in delicately hued enamel,  occupies the entire surface of the four panes. The dark patterns that decorate  the pale lavender of Abraham’s gown lend the curvaceous dynamic forms further  momentum27 and reinforce their presence against the uniformly light  background. The two semi-circular panes crowning this motif are filled with an  abstract, cloudy pattern of swirling tones, blue, gray, and violet, while in  the round, uppermost pane beneath the arch the head and wings of the angelic  herald have been multiplied to form a St. Andrew’s Cross, clasped on either  side by pale green pendentive-shaped forms—a somewhat placid conclusion  perhaps, but remote and not easily deciphered.
 Polke  engages in a loose treatment of the biblical narrative. Sparse means such as  quotation, repetition, mirroring, and his innovative use of glass-making  techniques suffice to effect a gradual transition towards more abstract forms,  coupled with a shift of signification into a timeless, universal dimension,  thereby conveying a powerful impression of the eloquence and complexity of  ornamental symbolism.
  The  Scapegoat Polke  has dedicated the fifth figurative window to the Scapegoat.28 The  figure of the ram already depicted in Isaac’s sacrificial ceremony that was  based on the full-page miniature from Aelfric’s Paraphrase29 is  now repeated and shown to best advantage in a different context. One sees a lissom  creature with white shaggy fleece, graceful legs, and sure-footed hoofs. Here  Polke has used his characteristic technique of colored halftone dots to model  and accentuate the contours through painting.30 The simultaneous  narrative representation assembling different temporal strands is based on the  scene in the medieval miniature relating the scapegoat’s dispatch into the  wilderness. The two-tier lateral division of the slender window enables the  creature to be magnified to imposing dimensions. In the lower section one sees  the animal’s hindquarters as far as the shoulder, trotting from right to left  over uneven, verdant ground and wrapped around by a vine, thereby introducing  the theme of flora. On the upper tier, as if in the meantime it had ascended a  distant plateau, the animal’s forequarters enter the picture from the left. Its  hoofs are still standing on fertile green ground, from where a spiral of  foliage curls up towards the goat’s head; yet the scene is cast in the pale  pink hues of the desert’s dazzling light; everything is irradiated by the white  sun which, like its alchemical symbol31, is surrounded by a halo.32 The animal, with amber tusks,  appears calm and unperturbed;33 there is a knowing quality in its  anthropomorphic gaze; a damson red tear hangs from its cheek. Polke has  bestowed this innocent creature with the most exquisite jewelry since the  burden borne by the goat is clearly visible. Here, too, the painter has chosen  precious stones and worked them into the glass, strewing the animal with  glittering slices of tourmaline as if the conglomerate of the deplorable load  on its body had wondrously metamorphosed. No other mineral displays such a  plethora of color as the rare crystal tourmaline.34 Among crystals  it is distinguished by a number of exceptional features. In Arabic tradition it  is considered the stone of the sun and credited with healing powers. Polke has  distributed eighteen differently sized discs, mainly on the animal. A few  smaller ones are speckled over the plants. A red heart is hovering below,  somewhere between hoof and foliage. Predominant are the large rubellites,  slices of red, pink, and mauve adorning the goat’s forehead, neck, and breast,  with darker gems spread across the back, the torso, and hind legs. Almost all  of them, even the smaller, pale green and pink discs and the yellow and brown  ones, harbor the central triangle of tourmaline accumulated in exact layers  around the core; especially radiant is the largest tourmaline disc as light  floods through the prism of its triple-winged column.35 Polke exalts  his motif with the precious stones, as well as the glass in which he has  assembled them. Here too, on the margins of the wilderness, he enlists them to  evoke geological time, lending visual expression to the beauty and profusion of  natural color and nature’s creative powers, as well as to the fascinating  composition of crystals, the dignity of the animal, and the enigmatic movement  of plants. They gleam in the white light of the sun and are exposed to mortal  danger. It is, so it seems, no accident that this window bears the artist’s  signature for all twelve of them: “Gestaltung Sigmar Polke / Glasmalerei Mäder  / Zürich / 2009.”36 The  impression made by these church windows has a lasting effect. They convey an  idea of how perceptively the artist has responded to the site and the  situation, yet never leaving us in any doubt about the magic and the natural  lightness and elegance of his art. Transparency and translucency are crucial  factors in this, as are his powers of invention and flexibility that never  cease to surprise. Here, in a place where the function of the windows and the  unusual artistic materials of glass, agate, and tourmaline provide entirely  different conditions to those of, on the whole, artificially lit exhibition  spaces, natural light37 permeates the works in tune with the  changing seasons and times of day, making their images visible, and setting  constantly shifting accents. The volatile moods of meteorology, clear and  overcast skies, and passing clouds all contribute to the windows’ appearance,  which is animated, timeless, and tranquil by turns. An evening stroll across  the square and around the church when lights are burning inside is a stunning  sight. This is when these images reveal themselves from the other side. The  precious stones dazzle with exquisite gleam; the figures—the king, the prophet,  the wondrous animal — emerge as mysterious apparitions.
 The  uncommon openness in Polke’s art, an expression of his particular alertness to  the world, has led him here to choose several separate subjects rather than a  single complete theme, and to treat these according to a wide range of creative  principles. Numerous references relating to the history and specific nature of  different genres of painting emerge: seeing, appearance, and perception are  examined and challenged. The eye-like agate discs convey a sense of being  looked back at. All these aspects transpire as part of a concept that explores  the possibilities of contemporary painting from a variety of angles and always  incorporates the viewer. Here his gaze does not attempt to penetrate depth nor  seek access to concealed, obscured layers; it examines instead what approaches  us in the light and what comes to the fore “from the very base.”
 The  spiritual space that appears in these window images has a very broad time  horizon. The crystalline strata within the agate bring alive the primordial  geological era of the first days of Creation. All the figural motifs derive  from the Old Testament and relate typologically to Christian notions of the  Messiah, whose epiphany finds expression in the windows by Augusto Giacometti  in the chancel. Linked to each concept and each figure chosen by Polke is a  further biblical story, opening up an arc which stretches from mythical accounts  of the world’s inception to historical time, from oral tradition to the words  and images that keep alive and lend visual presence to these stories. By  selecting medieval miniatures as models for his motifs, Sigmar Polke references  imagery from the period when the Grossmünster was built. But for his source  material he turns to xeroxed reproductions of photographs of the miniatures,  which in turn were shaped by iconographic tradition. He highlights telling  details, imbues them with new color, substance, and dimensions. On the one  hand, they have been preserved; on the other, they are subject, in their new  context, to reinterpretation and adjusted to the context’s pictorial  significance—of which they themselves are constitutive parts. In lieu of a chronological  sequence and linear narration, Polke turns to simultaneity and isolated  depictions. Although the windows function as a single, inherently consistent  artistic ensemble, they also underscore the possibility of individual  interpretation and the autonomy of each image. These are never conclusive or  unequivocal, and their symbolic potential remains inexhaustible. They lay  themselves open to contradictions and conflict, to illusion and wonder, to good  faith, severity, and healing, to the beauty of the earth and the dignity of  living things. These are images one can constantly return to and repeatedly  interrogate.
 
 
                   
                    
                      | 1 | Paul    Groot, “Sigmar Polke, Impervious to Facile Interpretations. Polke wants to    Reinstate the Mystery of Painting” in: Flash Art, 140, May–June, 1988, pp. 66–68. Cf. also: G. Roger Denson,    “The Gospel of Translucence according to Polke” in: Parkett, 30, 1991, pp. 109–114. Sigmar Polke began his art training    with an apprenticeship in stained glass at the glassmakers Derix in    Düsseldorf-Kaiserswerth in 1959–1960. |  
                      | 2 | Since    the term translucency/translucent is not common currency in everyday German,    the word transparency is used to denote both phenomena. |  
                        | 3 | The    translucency results from the different way in which the resin-soaked fabric    reflects and transmits light waves through the material. |  
                          | 4 | Polke    makes these lenticular screens himself using an elaborate procedure. |  
                            | 5 | Cf.    Charles W. Haxthausen, “Space Explorations – Sigmar Polke’s ‘Lens Paintings’”    in: Wunder von Siegen/Miracle of Siegen, exh. cat. Siegen, 2007 (Cologne: DuMont Buchverlag, 2008), pp.    44–51. |  
                              | 6 | The    stone was named agate by    Theophrastus of Eressos (c. 371–287 BC) because it occurred in abundance along the river    Achates in Sicily, but it was already being used in ancient Egypt to make    signets, jewelry, and small vessels. It is mentioned in the Bible in Exodus    28:17–21. In addition to the gemstones amethyst and jacinth, it was supposed    to embellish the breastplate of the priest. In antiquity agate was used to    make precious ornaments; it found particularly beautiful application in the    decorative art of pietra dura in the Renaissance. |  
                                | 7 | Sigmar    Polke, “Athanor,” 42nd Venice Biennale, German Pavilion, 1986, curated by    Dirk Stemmler. |  
                                  | 8 | Example:    Museum of Modern Art, San Francisco, November 1990–January 1991. |  
                                    | 9 | Bible moralisée, Codex Vindobonensis 2554,    from the Österreichische Nationalbibliothek, Vienna, title page 1, folio I v;    the book is dated to approximately the same period as the construction of the    Grossmünster in Zürich. |  
                                      | 10 | Agate    is a microcrystalline variety of quartz that accrues in numerous layers    through rhythmical crystallization as it turns into characteristically    almond-shaped nodules in a constant process of lining or filling out    cavities—frequently vapor vesicles entrapped in cooled lava—during which all    manner of glittering white, roughly shaped crystals are formed. In its    natural form agate on the whole exhibits bluish, beige, brown, orange, and    green hues, yet never cobalt blue, magenta, purple, or pink, which,    especially in view of requirements for jewelry and ornaments, resulted in the    development of methods to synthetically color agate through “burning” and    chemical baths. |  
                                        | 11 | The    tympanum was removed and replaced by glass in 1766 when the windows were    enlarged. |  
                                          | 12 | Bible moralisée (see note 9), 2 folio I,    medallion in the upper line on the left. |  
                                            | 13 | They    appear so, but are in fact larger than life. |  
                                              | 14 | The    figure/ground illusion named after the Danish psychologist Edgar Rubin,    1886–1951. |  
                                                | 15 | Sigmar    Polke, Menschenmenge, 1969,    dispersion paint on canvas, 180 x 195 cm, Kunstmuseum Bonn. |  
                                                  | 16 | Wolfgang    Schöne, Das Licht in der Malerei    (Berlin: Verlag Gebrüder Mann, 1954, 4th edition), p. 203: “weisse Helle.” |  
                                                    | 17 | 2    Kings 2:9–13: “And so it was, when they had crossed over, that EIijah said to    Elisha, ‘Ask! What may I do for you, before I am taken away from you?’ Elisha    said, ‘Please let a double portion of your spirit be upon me.’ So he said,    ‘You have asked a hard thing. Nevertheless, if you see me when I am taken    from you, it shall be so for you; but if not, it shall not be so.’ Then it    happened, as they continued on and talked, that suddenly a chariot of fire    appeared with horses of fire, and separated the two of them; and Elijah went    up by a whirlwind into heaven. And Elisha saw it, and he cried out, ‘My    father, my father, the chariot of Israel and its horsemen!’ So he saw him no    more. And he took hold of his own clothes and tore them into two pieces. He    also took up the mantle of Elijah that had fallen from him, and went back and    stood by the bank of Jordan.” See also: 1 Kings 19:16: “…And Elisha the son of Shaphat of Abel Meholah    you shall anoint as prophet in your place.”; and 1 Kings 19:21: “…Then he    arose and followed Elijah, and became his servant.”
 |  
                      | 18 | P,    “Ascension of Elijah,” Sens Bible, 452 x 290 mm, Sens, Bibl. Mun. 1. folio 163 v; reproduced in:    Walter Cahn, Romanesque Manuscripts. The Twelfth Century (London, 1996), vol. II, fig. 177 (kindly recommended by    Jacqueline Burckhardt and Bice Curiger). Like Hans Swarzenski (in: “Fragments    of a Romanesque Bible,” Gazette des Beaux-Arts    [Mélange Pocher],(Paris, 1963, p. 79), Cahn    reproduces a somewhat dated photograph of the page by H. Pissot which does    not render the entire page. It shows a picturesque initial, probably drawn in    the twelfth century in the Champagne or northern Burgundy region. The letter    P stands at the beginning of 2 Kings 1: “Prevaricatus est autem moab in Israel postquam mortuus est    ahab” (Moab rebelled against Israel after the death of Ahab). Speaking about    the motif in an interview with Peter Schjeldahl (“Many-Colored Glass,” New Yorker, May 12, 2008), Polke    also makes reference to the Greek god Helios. |  
                        | 19 | Sigmar    Polke, Sternenhimmeltuch,    1968, felt, adhesive tape, cord, cardboard sheets, 250 x 240 cm, private    collection. |  
                          | 20 | Carved    into the capital of a half-column in the northern portal of the Grossmünster    is an image of the musician-king. |  
                            | 21 | This    image is supposedly based on a typical medieval miniature of Herod, whose    source is unknown (kindly suggested by Bice Curiger). |  
                              | 22 | Polke    was presumably seeking to achieve a typically medieval depiction of a    monarch. The gesture could be said in general terms to suggest David’s role    as a forerunner. |  
                                | 23 | Psalm    23 (attributed to King David): “The Lord is my shepherd, I shall not want, He    makes me to lie down in green pastures, He leads me beside the still waters…” |  
                                  | 24 | Aelfric’s Paraphrase, London, British Library,    Cotton MS Claudius B iv, fol. 3, “Abraham and Isaac.” Polke worked from the    black-and-white reproduction in: Walter Cahn, Die    Bibel in der Romanik (Munich: Hirmer Verlag,    1982), p. 89. Using this reproduction as source material for the window The    Sacrifice of Isaac (nIII), Polke adopted the motifs of Isaac clutching the head of    Abraham; the torso of Abraham brandishing his sword; the angel; the goat. The    same goat is also used for the motif of the Scapegoat in the eponymous window (nIV). |  
                                    | 25 | Polke    apparently spoke of a “bloodstain” (kindly mentioned by Urs Rickenbach). |  
                                      | 26 | They    are semi-concave lenses specially made by the glass manufacturer Mäder AG,    whose curvature points into the church’s interior. |  
                                        | 27 | Urs    Rickenbach speaks of a damask pattern. Based on the shape of Abraham’s body,    it was hand cut (sand blasted) and subsequently melted into a shade of dark    violet using colored granulated glass. |  
                                          | 28 | Leviticus    16:5–28, on the rite for the Day of Atonement: “…Aaron shall lay both his    hands on the head of the live goat, confess over it all the iniquities of the    children of Israel, and all their transgressions, concerning all their sins,    putting them on the head of the goat, and shall send it away into the    wilderness by the hand of a suitable man. The goat shall bear on itself all    their iniquities to an inhabited land; …” Here Polke uses the same image of the ram for his representation    of the scapegoat rather than portraying an actual goat.
 |  
                      | 29 | Aelfric’s Paraphrase (see note 24). |  
                        | 30 | The    contours and the fleece of the goat are dot-screened in brown, the plants in    green. |  
                          | 31 | The sun    is represented by the same alchemical symbol as gold. |  
                            | 32 | Urs    Rickenbach informs me that the pink pane is mounted over a pane of white    glass. The center of the sun and the halo were sandblasted so deeply that    they gleam in bright white. Given the overall lightness of the window’s hues,    Polke rendered the entire glass in a structure that somewhat obscures its    transparency. |  
                              | 33 | Contemporary    research has shown that herd animals such as sheep can recognize the faces of    fifty members of the same species for up to two years. As herd animals they    panic when separated from their flock. |  
                                | 34 | Tourmaline    is a boracic silicate crystal compounded with elements such as magnesium and    aluminum. The stone’s composition is complex and ranges from transparent to    opaque, changing color when observed from different angles (pleochroism).    Exposed to heat it becomes electrically charged (pyroelectric and    piezoelectric properties), is resistant and stable in color. In its double    refraction of light, the mineral absorbs some of the rays of light. High    absorption can cause the stone to gradually darken in tone, but it retains    the same color. The stones used in these windows are from Madagascar. On    tourmaline, cf. the comprehensive monograph by Friedrich Benesch, Bernhard    Wohrmann, The Tourmaline A Monograph (Stuttgart: Urachhaus, 2004); also: Paul Rustemeyer, Faszination Turmalin: Formen – Farben – Strukturen (Heidelberg/Berlin: Spectrum Akademischer Verlag, 2003). |  
                                  | 35 | Here    Polke has integrated the natural pattern of the crystal into his composition    in such a way that the tourmaline resembles a lens screening or x-raying the    stalk of the plant as it rises up over the goat, thereby reversing its color. |  
                                    | 36 | “Designed    by Sigmar Polke/stained glassmakers Mäder/Zürich/2009.” |  
                                      | 37 | A    certain level of artificial lighting is in fact installed to illuminate the    wall below the higher windows via yellowish spotlights and to provide basic    lighting for the space at the rear and the side of the church. |  
 The text of the Laudatio is published in extended form  in:Sigmar Polke. Fenster – Windows. Grossmünster Zürich, Parkett Verlag, Zurich  2010
 ©This text and/or any parts of it may not be reproduced, stored in a  retrieval system or transmitted, in any form or by any means, electronic,  mechanical, photocopying, recording or otherwise without the written permission  of the author and Parkett Verlag, Zurich.  |