A Renaissance-style stained-glass window painted in grisaille and enamels depicts Duke Berchtold V of Zähringen, founder of the city of Bern, who, according to legend, killed a bear on the site where the city was founded.

He is flanked by two knights in armor bearing a banner symbolizing a bear and a lion. At the top, each cartouche depicts a bear hunt, representing the legend of the duke.

At the bottom is the inscription: DIE STATT BERN 1524