Wonderfully nerdy and absolutely beautiful. Just unveiled to the world last Saturday: this piece in Spiegel (image via) has many amazing photos, comments from Richter and community response, this snip from Wired prior to the opening explains the nerdy significance:
Contemporary German artist Gerhard Richter designed the 65-foot-tall work to replace the original, destroyed by bombs in World War II. As a starting point, he used his own 1974 painting 4096 Colors. To create that piece – a 64-by-64 grid of squares – Richter devised a mathematical formula to systematically mix permutations of the three primary colors and gray. Funny coincidence: 4,096 is also the number of “Web-smart” colors that display consistently on older computer screens, a limitation some Web designers still take into account. (Today’s monitors, of course, can handle pretty much any hue.) The Cologne window is made of 11,500 four-inch “pixels” cut from original antique glass in a total of 72 colors. Why not 4,096? Turns out there are stained glass-smart colors, too. Some hues in Richter’s initial design were either historically inaccurate or too pale – they would have outshone the squares around them. So the artist modified his palette to include only colors with a suitably archaic cast.