The Basilic, or The Ottoman Cannon was a supercannon designed by Urban, a Wallachiancannonengineer, Saruca Usta and architect Muslihiddin Usta at a time when cannons were still new. It was horribly inaccurate, but when it hit, it caused massive damage to Constantinople's walls. Additionally, due to the material the cannon was constructed of, and the intense heat created by the charge, the cannon had to be cooled with olive oil between shots to prevent cracking. The heat also prevented the cannon from being fired more than three times per day. Ultimately, it lasted all of six weeks before becoming non-functional.