Quimper Cathedral, formally the Cathedral of Saint Corentin (French: Cathédrale Saint-Corentin de Quimper, Breton: Iliz-veur Sant-Kaourintin), is a Roman Catholic cathedral and national monument of Brittany in France. It is located in the town of Quimper and is the seat of the Diocese of Quimper and Léon. Saint Corentin was its first bishop.
The cathedral is notable in that, unlike most other Gothic cathedrals, it slightly bends in the middle to match the contours of its location, and avoid an area that was swampy at the time of the construction.