The main stained glass window of the chevet, which is effectively the window lighting the choir, dates to between 1280 and 1290. The window was restored at the beginning of the 17th-century and was reglazed in 1870 when many of the older frames were saved by the glazier/artist Oudinot. This major restoration was commissioned by Monseigneur l'abbé Brignon. During the 1944 bombing which preceded Dol-de-Bretagne's liberation from German occupation, explosions badly damaged the window necessitating restoration work by the master glazier Jacques Gruber. A further restoration was carried out between 1982 and 1986. The window is made up of eight lancets above which is an elaborate tympanum and these lancets contain forty-eight frames recounting details from the lives of those saints said to have relics held in the cathedral. These are a belt from Sainte-Marguerite, pieces of the chêne de Mambré, remnants of saint Samson and sainte Catherine's teeth. The eight lancets, from the left and from the top to the bottom depict:-