Ottoman Giant Siege Cannon (Orban's Gun)

Timeline

1. 1452Cannon foundry at Edirne (Adrianople) · ThraceHungarian-born founder Orban had offered his skills to the Byzantine Empire but left over low pay, and in 1452 switched to Sultan Mehmed II. Mehmed II provided ample funds and materials and ordered him to cast one of the largest siege guns in history at Edirne: a barrel about 8 meters long with a bore of about 76 cm, requiring 60 oxen and over 200 men to drag.
2. 1453Gun emplacement at the St. Romanus Gate, Constantinople · ConstantinopleOrban's gun took about two months to transport from Edirne to positions outside the city, deployed alongside dozens of other guns. From April 6, 1453 it bombarded the Theodosian Walls for 53 days, firing about 7 rounds daily, each requiring about 2 hours of cooling. It repeatedly blew breaches in the walls, keeping the defenders exhausted with repairs. In the final assault on May 29 the breach was stormed, the last emperor Constantine XI was killed fighting on the walls, and the Eastern Roman Empire fell.
3. c. 1453–1550Europe and the Near East · Near EastThe success of Orban's gun forced European powers to reexamine medieval castle defenses, accelerating the spread of the star-fort trace italienne. The gun proved the decisive status of heavy cast cannon in siege warfare, driving both Europe and the Ottomans to develop artillery technology on a massive scale in the 15th–16th centuries, fundamentally ending the dominance of towering stone walls in military defense.