High above the banks of the River Main in Würzburg rises the Marienberg Fortress. Crowned by the massive fort that was once the seat of the Prince-Bishops from the mid 13th century until the construction of the Residenz, the hill was once the location of a Bronze Age hill fort. Highlights include the spectacular Bibra Apartment with its collections of fine furniture, tapestries, and artwork; the Princes' Hall with its large tapestry; and the treasury and vestment chamber. Also of interest is the Baroque Armory dating from 1712 and home to the Mainfränkisches Museum with its superb collections of Franconian paintings and sculptures. Afterwards, be sure to visit the large Princes' Garden dating from the early 18th century, which offers spectacular views over the old city.