The document discusses stained glass windows from several Gothic cathedrals in France, primarily Sainte-Chapelle in Paris and Chartres Cathedral. It provides details on the dates and locations of the stained glass windows, which span from the 12th to 15th centuries. The stained glass windows at Chartres Cathedral are particularly renowned for their large collection and vivid blue coloration, with over 150 original 13th century windows remaining, constituting one of the most complete collections of medieval stained glass in the world.