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. Parts of the castle were inhabited for a period, before falling into ruin during the course of the 17th century. In 1912, the Commissioners of Work took over management of the site, repairing the brickwork and carrying out an archaeological survey. In the 21st century, the castle is controlled by English Heritage and open to visitors.