The majestic and ethereal Cologne Cathedral in Germany has survived many centuries since first built in the middle ages. Its South Transept window was destroyed in World War II and was replaced with plain glass. In 2007 the cathedral architect commissioned Gerhard Richter, renowned German artist, to design a replacement window in stained glass. His decision to create a “kaleidoscope” of color, using a random computer selection process, was controversial. At least one Cardinal refused to attend the unveiling. But for many others the 11,500 panels in 72 colors create a beautiful “Symphony of Light”.