Saint-Pol-de-Léon Cathedral

Saint Paul Aurelian Cathedral was a Roman Catholic cathedral, now basilica, in Saint-Pol-de-Léon, in the Finistère department in Brittany in north-western France. The 13th-century church stands on the site of the original church founded by Saint Paul Aurélien in the 6th century. It is a listed monument since 1840.

Source: Wikipedia