A watermill or water mill is a mill that uses hydropower. The oil mill is a functioning watermill with an attached mill museum. The swastika often represented perpetual motion, reflecting the design of a rotating windmill or watermill. There is a working watermill at Tocketts Mill. It is based at Tunbridge Mill, a post-medieval watermill. A ship mill is a type of watermill. Upper Mill is recent reconstruction of a watermill that has existed here from Anglo-Saxon times. A different type of watermill is the tide mill. It was refurbished into living accommodations with the original watermill and wheelhouse incorporated. Seven buildings are listed, its watermill and two of the churchyard tombs. Next to the bridge there was possibly a watermill and an inn. By 1904 the earlier watermill had been demolished. There was a watermill on the River Croal. The first recorded watermill in Cham was built in 1279. Cormac freed her from this labour by having a watermill built.