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Constantinople Defense System

Type Object Region Byzantine Empire Time 413–1453

Constantinople's defenses, centered on the Theodosian Walls, Golden Horn chain, and sea defenses, endured Murad II's long siege of 1421-1430 before f…

Timeline

  1. 413–450Constantinople land walls · BosphorusUnder Theodosius II a triple land defense of inner wall, outer wall, and moat was built, supplemented by the Golden Horn chain and sea patrols, laying the foundation for a thousand years of city defense.
  2. 674–1204Constantinople · TurkeyThe defenses repeatedly repelled Arab fleets and land assaults; in 1204 the Fourth Crusade broke through a weak point in the sea walls, the Byzantine Empire was briefly divided, and the wall system was severely damaged before being rebuilt.
  3. 1422–1428Constantinople · ByzantineOttoman sultan Murad II led a large army to besiege Constantinople; Byzantine emperor John VIII and the commander Giovanni Giustiniani organized the defense, and the walls were damaged in several places by cannon fire but ultimately held.
  4. 1453Constantinople · TurkeyMehmed II bombarded the Theodosian Walls with giant cannons, and Ottoman troops entered through the breach at the Kerkoporta gate; the thousand-year Byzantine Empire fell, and the defense system ended as an independent military object.

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