Despite damage by Parliamentary forces in 1642 and 1643, Wells Cathedral has one of the most extensive collections of medieval stained glass in England. The earliest surviving glass is found in two windows on the west side of the chapter-house staircase and dates from the late 13th century. It was executed by a French artist named Jean de Brie. The next major phase of window-making occurred between 1250 and 1300. A total of 34 new windows were installed, including some remarkable scenes that show how popular religious art had become. One such scene shows King Arthur's court sitting at a table covered with all kinds of food and drink for a banquet. In the center sits a figure known as "the Fool" who is playing with a ball that he is not aware contains a dragon's head inside it. Above the scene are three rows of small figures that appear to be dancing or playing musical instruments. This kind of image would have been meaningful because jokesters like the Fool and musicians like drums and pipes - even dragons! - were common characters in medieval stories. They could also act as symbols for things like folly (the Fool) or music (the musicians). Another important scene is found in the south transept. Here we see the birth of Christ depicted in several panels that run the length of the wall. Each panel is made up of a large piece of colored glass set into a wooden frame.