Chartres Cathedral, also known as the Cathedral of Our Lady of Chartres, is a Roman Catholic church in Chartres, France, about 80 km (50 miles) southwest of Paris, and is the seat of the Bishop of Chartres. Mostly constructed between 1194 and 1220, it stands at 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. It is in the High Gothic and Romanesque styles.

The cathedral was designated a World Heritage Site by UNESCO in 1979, which called it "the high point of French Gothic art" and a "masterpiece".