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Avar–Persian siege of Constantinople

While Emperor Heraclius campaigned in the East, the Avar khagan with Slav and Bulgar allies besieged Constantinople in concert with a Persian army across the Bosporus; the Byzantine fleet kept them apart, and the siege failed.

Date
29 June – 7 August 626exact date · duration: 39 daysDate in the Julian calendar
Place
Constantinopletoday: Istanbul, Turkey · Balkans and Anatolia
Participants
Avars, Sasanian Empire, Byzantine Empire, Heraclius
Threads
Early medieval Europe (500–1000)
Also known as
Siege of Constantinople (626); Осада Константинополя (626)

The Avar vanguard appeared before the Theodosian Walls on 29 June 626, and the khagan arrived with the main army — up to 80,000 Avars, Slavs and Bulgars — on 29 July. Across the strait, the Persian general Shahrbaraz was encamped at Chalcedon. The city was defended by the patrician Bonus and Patriarch Sergius, who carried the icon of the Virgin along the walls. In early August the Byzantine fleet sank the Slav dugout boats (monoxyla) that tried to ferry Persian troops across the Bosporus, and on 7 August, when the Slavs attacked the sea walls from the Golden Horn together with an assault on the land walls, their flotilla was destroyed; the next day the khagan withdrew.

The Avar khaganate never again threatened Constantinople, and its authority over the Slavs weakened. The deliverance was attributed to the Virgin; a new proem of the Akathist hymn is traditionally linked with it. In 627 Heraclius invaded Mesopotamia and forced Persia to make peace.

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Sources

  1. Wikipedia (English): Siege of Constantinople (626)
  2. Wikipedia (Russian): Осада Константинополя (626)
  3. Howard-Johnston J. The Siege of Constantinople in 626 // Constantinople and its Hinterland / ed. C. Mango, G. Dagron. — Aldershot: Variorum, 1995. — P. 131–142.
  4. Wikidata: Q312268