Cathedral of St. Peter and Paul

The first temple was built here in the 4th century AD, which was replaced in the 9th century by the Romanesque cathedral, and in the 13th century by a Gothic cathedral, which was expanded for the next 400 years. Here are the mortal remains of St. Bernard of Clairvaux. The oldest part of today's building is the 13th-century choir and the famous stained-glass windows from the 12th-19th century with an area of 1500 m2.