The Gothic building of the flour mill of Cluny Abbey was erected east of the abbey, inside the abbey park, at the end of the 13th century. Some 177 ft (54 m) long, it rises on two levels from different periods, the first level clearly pre-existing the building currently visible, and includes a vaulted cellar. Connected to the Tour du Moulin (Mill Tower), which is part of the park enclosure, the flour mill now houses a museum in which are exhibited the capitals of the choir of Cluny III considered masterpieces of Romanesque sculpture.