sentences:  It was built in 1745—55 as a folly in the form of a castle which incorporated office spaces and recreation rooms, but may have originally been a stable block and laundry for the lord of the manor.The building was probably designed by either William Halfpenny or James Bridges, for the prominent local factory owner William Reeve of Mount Pleasant (now the Arno’s Court Hotel), from which it is separated by a major road junction.Reeve smelted brass and copper, and the Black Castle was built from blocks created from the waste slag.