Fatih Sultan Mehmet II had his namesake built on the ruins of the Havariyun, or the Church of Holy Apostles, which served as the seat of Christianity after the conquest, from 1453 to 1456. At that time, the church was second only to the Ayasofya in importance and therefore served as the burial place of every emperor from Constantine I to Constantius VIII (from A.D. 337 to 1028!). Alexius III Angelius looted the graves to fill his imperial coffers; the graves were again looted during the Fourth Crusade. In addition to the commanding mosque, the eight medreses (schools) founded by the sultan are the only surviving sections of a complex that included a caravansary, a hospital, several hamams, kitchens, and a market, which combined to form a university that instructed up to 1,000 students at any given time. Wanting a monument more spectacular than that of Ayasofya, the sultan cut off the hands of the architect, Atik Sinan (not Süleyman's Sinan) when the Fatih Mosque failed to surpass the height of the church, despite its position atop the fourth of the seven hills of Istanbul. The tombs of Fatih Mehmet II and his wife (mother of Beyazit II) are located outside of the mihrab wall.