Notre Dame de Mantes

The medieval Collegiate Church of Our Lady of Mantes,, is a large and historically important Catholic church constructed between c.1155 and 1350 in the small town of Mantes-la-Jolie, about 50 km west of Paris. Although not a cathedral, it was built on a cathedral-like scale. Its grandeur, its quirky design and its strong associations with the Capetian dynasty make the church particularly interesting to architectural historians.

Source: Wikipedia