South Transept Window of the Cologne Cathedral, 2007. Stained glass. Height: 66 feet. Photo: Guido Schiefer. Images are used by permission of the Cologne Cathedral. "Gerhard Richter, who lives in Cologne, gave his work on the window for free, while the production costs totaling 370,000 euros were covered by private donations. The 75-year-old artist, who has a reputation for being a man of few words, seemed to be happy with his work and said he was proud "it hadn't gone wrong.”