The Cathédrale Notre-Dame de Chartres was constructed between 1194 and 1220, on the site of at least five cathedrals that have occupied the site since the Diocese of Chartres was formed as an episcopal see in the 4th century.

In 1697, the Diocese of Blois was erected from the territory of Chartres. It 1802, the Diocese of Chartres was suppressed, and the area placed under the newly created Diocese of Versailles.