The church, which replaced a former 12th century castle chapel, boasts an imposing long gothic form, stood against the eastern walls. The edifice adapted over time to the growing importance of its strategic role. Enlarged and redesigned as the centuries went by, it was damaged by a number of sieges and a fire in 1834.The monumental tower built around 1301 was cladded with calcareous stone at the end of the 19th century. The gothic gateway is made up of two twin broken-bowed doors. A kneeling figure in the centre and Saint George slaying the dragon can be seen. The church is a listed building and includes a gothic cryptdating from the 15th century, a monumental stone tabernacle from 1520 and 16th century baptismal fonts. The basement is a veritable cemetery: 295 people were buried there. Many tombstones of persons of note and monks can still be seen inside and outside along the southern gable.