eces. The texture of the glass, the glow of the rich color, the drama created by the tone of the piece and the rectilinear or symmetrical arrangement of the design all add to the uniqueness of each individual window made during the 11th-15th centuries. The 13th century was the age of colored wall of glass. The 14th century was the age of colored prospective. The 15th century was a time of transparent walls with fancy interruptions of color. After the 15th century there were only imitation pictures and revivals until the modern times. The Cathedral of St. Julien du Mans in Le Mans, France contains many masterpieces of stained glass from the 11th-13th centuries it was built during the Byzantine Empire. The windows of St. Julien du Mans survived through the devastating fires of 1134 and 1136. They are not in their original positions, the original construction and design of the Cathedral of Le Mans was later hypothesized. The oldest estimated, existing stained glass window is The Ascension. The window was believed to be dated around 1081 and 1097 at the time of the Episcopate of Bishop Hoel who glazed the windows of Le Mans in their completion.
             I will begin by describing the different aspects of the Ascension and other stained glass pieces in order to show how much work and skill it takes to create a single stained glass window. One stained glass window is made in steps with many different artists in order for completion. The master designer drew the exact composition of the planned window on a wooden panel. This indicated all of the linear details and marking the colo
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