An unmissable historical monument, this cathedral is of great architectural interest. Started in the 14th century and completed in the 18th century, it is a fortified church with an austere and stern look, and a Gothic interior. Stained glass renovated in 1999, choir ornamented with beautiful 15th-century stalls, a part of which was faithfully reconstructed following a fire in 1983. The 16th-century Renaissance retable was a gift from the Bishop of Geneva.