Urban the Cannon Founder: The Man Who Broke Constantinople's Walls

In 1453, the Theodosian Walls of Constantinople had never been breached in over a thousand years. Then a Hungarian or Wallachian engineer named Urban offered his services. After being turned down by the Byzantine emperor, Urban crossed the Bosphorus to the camp of Sultan Mehmed II. There he cast the largest bombard the world had ever seen — a monster that could hurl a 600-pound stone ball over a mile. This episode follows Urban's journey from the courts of Edirne to the final siege, where his great bombard, the Şahi, pounded the walls day after day. We explore the technical specs of the cannon, the logistics of moving it overland with 60 oxen and 400 men, and the controversies around its effectiveness — did Urban's cannon truly breach the walls, or was it the cumulative effect of smaller guns and sappers? We also look at the myth of Urban's execution by Mehmed, the fate of the giant guns after the conquest, and how Ottoman artillery shaped the next century of warfare. A story of ambition, betrayal, and the dawn of gunpowder sieges.

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