Kirby Muxloe Castle, also known historically as Kirby Castle, is a ruined, fortified manor house in Kirby Muxloe, Leicestershire, England. William, Lord Hastings, began work on the castle in 1480, founding it on the site of a pre-existing manor house. William was a favourite of King Edward IV and had prospered considerably during the Wars of the Roses. Work continued quickly until 1483, when William was executed during Richard, Duke of Gloucester's, seizure of the throne. His widow briefly continued the project after his death but efforts then ceased, with the castle remaining largely incomplete