Apr-Oct: Mon-Sat 9am-7pm, Sun 11.30am-5.30pm; Nov-Mar: Mon-Sat 9am-5pm, Sun 11.30am-5.30pm - Guided tour available in French by prior booking; crypt Apr-Oct: Mon-Sat 9am-6.45pm, Sun 11.15am-5.15pm - Nov-Mar: Mon-Sat 8.45am-4.45pm, Sun 11.15am-5.15pm
The cathedral, founded in 1030 and remodelled at the end of the 11C, is a Romanesque basilica with four towers and two domes and a UNESCO World Heritage Site. The transept is a masterpiece of harmony and balance. The chapel of the Holy Sacrament houses two 15C bas-relief sculptures. The Romanesque crypt, beneath the chancel and transept, consists of a network of groined Romanesque vaulting. Four Holy Roman Emperors and four German Kings are buried in the Emperors' Crypt.