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Alexios IV Angelos
Emperor of the Byzantine Empire
Reign 1203–1204
Full name Alexius IV Angelus
Born circa 1182
Died February 8, 1204
Predecessor Alexios III Angelos
Successor Alexios V Doukas
Dynasty Angelos
Father Isaac II Angelos
Mother Irene

Alexios IV Angelos (or Alexius IV Angelus) (Greek: Αλέξιος Δ' Άγγελος) (c. 1182 – February 8, 1204) was Byzantine Emperor from August 1203 to January 1204. He was the son of Emperor Isaac II Angelus and his first wife Irene. His paternal uncle was Emperor Alexius III Angelus.

Prince in exile[edit]

The young Alexios was imprisoned in 1195 when Alexios III overthrew Isaac II in a coup. In 1201, two Pisan merchants were employed to smuggle Alexius out of Constantinople to the Holy Roman Empire, where he took refuge with his brother-in-law Philip of Swabia,[1] King of Germany.

While there he met with Marquis Boniface of Montferrat, Philip's cousin, who had been chosen to lead the Fourth Crusade, but had temporarily left the Crusade during the siege of Zara to visit Philip. Boniface and Alexios discussed diverting the Crusade to Constantinople so that Alexios could be restored to his father's throne; in return, Alexios would give them 10,000 Byzantine soldiers to help fight in the Crusade, maintain 500 knights in the Holy Land, the service of the Byzantine navy (20 ships) in transporting the Crusader army to Egypt, as well as money to pay off the Crusaders' debt to the Republic of Venice with 200,000 silver marks. Additionally, he promised to bring the Greek Orthodox Church under the authority of the pope. Alexios accompanied Boniface back to the Crusader fleet, which had moved on to Corcyra, and the Venetians were in favour of the plan when they learned of it. In 1202 the fleet arrived at Constantinople. Alexios 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.


On July 18, 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 could not accept this, and forced Isaac II to proclaim his son Alexios IV co-emperor on August 1.

Despite Alexios' grand promises, Isaac, the more experienced and practical of the two, knew that the Crusaders' debt could never be repaid from the imperial treasury. Alexios, however, had apparently not grasped how far the empire's financial resources had fallen during the previous fifty years. Alexios did manage to raise half the sum promised (100,000 silver marks), by appropriating treasures from the church and by confiscating the property of his enemies. He then attempted to defeat his uncle Alexios III, who remained in control of Thrace. The sack of some Thracian towns helped Alexios' situation a little, but meanwhile hostility between the restive Crusaders and the inhabitants of Constantinople was growing.

In December 1203 violence exploded between the citizens of Constantinople and the Crusaders. Enraged mobs seized and brutally murdered any foreigner they could lay hands upon, and the Crusaders felt that Alexios had not fulfilled his promises to them. Alexios refused their demands, and is quoted as saying, "I will not do any more than I have done." While relations with the Crusaders were deteriorating, Alexios had become deeply unpopular with the Greek citizenry, and with his own father. Blinded and nearly powerless, Isaac II resented having to share the throne with his son; he spread rumours of Alexios' supposed sexual perversity, alleging he kept company with "depraved men". The chronicler Nicetas Choniates dismissed Alexios as "childish" and criticized his familiarity with the Crusaders and his lavish lifestyle. At the beginning of January 1204, Alexios IV retaliated against the Crusaders by setting fire to 17 ships filled with inflammable materials and sending them against the Venetian fleet, but the attempt failed.[2]

Deposition and death[edit]

At the end of January 1204, the populace of Constantinople rebelled and tried to proclaim a rival emperor in Hagia Sophia. Alexios IV attempted to reach a reconciliation with the Crusaders, entrusting the anti-western courtier Alexios Doukas Murzuphlus with a mission to gain Crusader support. However, Alexios Doukas imprisoned both Alexios IV and his father on the night of January 27–28, 1204. Isaac II died soon afterwards, possibly of old age or from poison, and Alexios IV was strangled on February 8. Alexios Doukas was proclaimed emperor as Alexios V. During Alexios IV's brief reign, the empire lost its territories along the Black Sea coast to the Empire of Trebizond.


  1. ^ Philip was married to Irene Angelina a sister of Alexios IV.
  2. ^ Nicolle, David (2011). The Fourth Crusade 1202-04 - the Betrayal of Byzantium. Oxford: Osprey Publishing Ltd. p. 65. ISBN 978 1 84908 319 5. 


Alexios IV Angelos
Angelid dynasty
Born: unknown 1182 Died: 8 February 1204
Regnal titles
Preceded by
Alexios III Angelos
Byzantine Emperor
with Isaac II Angelus
Succeeded by
Alexios V Doukas

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Alexios_IV_Angelos — Please support Wikipedia.
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