This individual (fl. circa 993) was the architect responsible for planning and designing Hogwarts Castle, along with Founder Rowena Ravenclaw, who devised the ever-changing floorplan. There is a golden statue of this individual at Hogwarts Entrance Hall, in which he is shown among the four house mascots holding a model of Hogwarts on one of his hands, and charts and a set square in the other. The statue guards a hidden passageway to the Founders' Tower.