Hope Castle, also referred to as Blayney Castle, is an 18th-century house built in the town of Castleblayney, located in County Monaghan, Ireland. Over the years, Hope Castle has been inhabited for various uses, such as homes to many, military barracks, a hospital, convent, and was most recently used as a hotel before it was burned down in an arson attack in 2010. The nuns lived here from 1942 to 1972.