Siege of Constantinople (1203)

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Siege of Constantinople
Part of the Fourth Crusade
Byzantine Constantinople-en.png
Map of Constantinople during the Byzantine era
Date 1203
Location Constantinople, Byzantine Empire
Result Alexios IV Angelos takes Byzantine throne
Byzantine Empire Fourth Crusade
Commanders and leaders
Alexios III Angelos Argent a chief gules.svg Boniface I
Republic of Venice Enrico Dandolo
15,000 men[1] and 20 ships[2] Crusaders: 10,000 men[3]
Venetians: 10,000 men[3] and 210 ships[4]

The Siege of Constantinople in 1203 was a Crusader siege of the capital of the Byzantine Empire, in support of the deposed emperor Isaac II Angelos and his son Alexios IV Angelos. It marked the main outcome of the Fourth Crusade.

The siege

To take the city by force, the Crusaders first needed to cross the Bosphorus. About 200 ships, horse transports and galleys would undertake to deliver the crusading army across the narrow strait, where Alexius III had lined up the Byzantine army in battle formation along the shore, north of the suburb of Galata. The Crusaders' knights charged straight out of the horse transports, and the Byzantine army fled south. The Crusaders followed south, and attacked the Tower of Galata, which held one end of the chain that blocked access to the Golden Horn. As they laid siege to the Tower, the Greeks counterattacked with some initial success. However, when the Crusaders rallied and the Greeks retreated to the Tower, the Crusaders were able to follow the soldiers through the Gate, and the Tower surrendered.[5] The Golden Horn now lay open to the Crusaders, and the Venetian fleet entered.

On 11 July the Crusaders took positions opposite the Blachernae palace on the northwest corner of the city. Alexios IV was paraded outside the walls, but the citizens were apathetic, as Alexios III, though a usurper and illegitimate in the eyes of the westerners, was an acceptable emperor for the Byzantine citizens. The siege began in earnest on 17 July, with four divisions attacking the land walls, while the Venetian fleet attacked the sea walls from the Golden Horn. The Venetians took a section of the wall of about 25 towers, while the Varangian guard held off the Crusaders[6] on the land wall. The Varangians shifted to meet the new threat, and the Venetians retreated under the screen of fire. The fire lasted for 3 days and destroyed about 440 acres (1.8 km2) of the city, leaving 20,000 people homeless.[7][8]

Alexius III finally took offensive action, and led 17 divisions from the St. Romanus Gate, vastly outnumbering the Crusaders. Alexius III's army of about 8,500 men faced the Crusader's 7 divisions (about 3,500 men), but his courage failed, and the Byzantine army returned to the city without a fight.[9]

On 18 July 1203 the Crusaders launched an assault on the city, and Alexios III immediately fled into Thrace. The next morning, the Crusaders were surprised to find that the citizens had released Isaac II from prison and proclaimed him emperor, despite the fact that he had been blinded to make him ineligible to rule. The Crusaders forced Isaac II to proclaim his son Alexios IV co-emperor on 1 August, effectively ending the siege.

After the 1203 siege

Following the end of the first siege of Constantinople in 1203, on 1 August 1203, the pro-Crusader Alexios Angelos was crowned Emperor Alexios IV of the Byzantine Empire, who then tried to stabilize the city. But riots between anti-Crusader Greeks and pro-Crusader Latins broke out later that month and lasted until November, during which most of the populace began to turn against Emperor Alexios IV.

On 25 January 1204, the death of co-Emperor Isaac II set off rioting in Constantinople in which the people deposed Alexios IV, who turned to the Crusaders for help but was imprisoned by the imperial chamberlain, Alexios Doukas, who declared himself Emperor Alexios V on 5 February. Emperor Alexios V then attempted to negotiate with the Crusaders for a withdrawal from Byzantine territory, but they refused to abandon their old treaty with Alexios IV. When Alexios V ordered Alexios IV's execution on 8 February, the Crusaders declared war on Alexios V. In March 1204, the Crusader and Venetian leadership decided on the outright conquest of Constantinople, and drew up a formal agreement to divide the Byzantine Empire between them. By the end of that month, the combined Crusader armies had begun the 1204 Siege of Constantinople as Emperor Alexios V began to strengthen the city's defences while conducting more active operations outside the city. [10]

See also


  1. S. Blondal, The Varangians of Byzantium, 164
  2. J. Phillips, The Fourth Crusade and the Sack of Constantinople, 159
  3. 3.0 3.1 J. Phillips, The Fourth Crusade and the Sack of Constantinople, 269
  4. J. Phillips, The Fourth Crusade and the Sack of Constantinople, 106
  5. "Sack of Constantinople, 1204". Retrieved 2008-12-30.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  6. "The Fourth Crusade and the Fall of Constantinople". Archived from the original on 2009-08-08. Retrieved 2008-12-30.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  7. J. Phillip "The Fourth Crusade and the Sack of Constantinople", 208-209
  8. J. Phillips, The Fourth Crusade and the Sack of Constantinople, 176
  9. J. Phillips, The Fourth Crusade and the Sack of Constantinople, 177
  10. David Nicolle, The Fourth Crusade 1202-04; The betrayal of Byzantium. Osprey Campaign Series #237. Osprey Publishing.

External links

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