Marienberg Fortress (early 13th century): 1253 – 1719 residence of the Prince Bishops; large-scale reinforcement and extension of the Fortress in the 17/18th centuries; extensive fortifications with the Church of the Virgin Mary (Marienkirche, built in AD 706, the oldest round church in Germany east of the Rhine), gateway (Scherenbergtor – 1345/1482), Renaissance Brunnentempel (well temple – approx. 1600) and Fürstenbau (Prince Bishop’s Hall) with late Gothic Bibra staircase (1511).
