The siege of Dyrrhachium took place from November 1107 until September 1108, as the

Italo-Normans The Italo-Normans ( it, Italo-Normanni), or Siculo-Normans (''Siculo-Normanni'') when referring to Sicily and Southern Italy, are the Italian-born descendants of the first Norman conquerors to travel to southern Italy in the first half of the ...

under

Bohemond I of Antioch Bohemond I of Antioch (5 or 7 March 1111), also known as Bohemond of Taranto, was the prince of Taranto from 1089 to 1111 and the prince of Antioch from 1098 to 1111. He was a leader of the First Crusade, leading a contingent of Normans on the q ...

besieged the

Adriatic The Adriatic Sea () is a body of water separating the Italian Peninsula from the Balkans, Balkan Peninsula. The Adriatic is the northernmost arm of the Mediterranean Sea, extending from the Strait of Otranto (where it connects to the Ionian Sea) ...

port city of Dyrrhachium. Dyrrhachium was held for the

Byzantine Empire The Byzantine Empire, also referred to as the Eastern Roman Empire or Byzantium, was the continuation of the Roman Empire primarily in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantinopl ...

by its '' doux''

Alexios Komnenos Alexios I Komnenos ( grc-gre, Ἀλέξιος Κομνηνός, 1057 – 15 August 1118; Latinized Alexius I Comnenus) was Byzantine emperor from 1081 to 1118. Although he was not the first emperor of the Komnenian dynasty, it was during ...

, a nephew of the reigning Byzantine emperor,

Alexios I Komnenos Alexios I Komnenos ( grc-gre, Ἀλέξιος Κομνηνός, 1057 – 15 August 1118; Latinized Alexius I Comnenus) was Byzantine emperor from 1081 to 1118. Although he was not the first emperor of the Komnenian dynasty, it was during ...

(). The siege is described at length in the ''

Alexiad The ''Alexiad'' ( el, Ἀλεξιάς, Alexias) is a medieval historical and biographical text written around the year 1148, by the Byzantine princess Anna Komnene, daughter of Emperor Alexios I Komnenos. It was written in a form of artificial ...

'' of

Anna Komnene Anna Komnene ( gr, Ἄννα Κομνηνή, Ánna Komnēnḗ; 1 December 1083 – 1153), commonly Latinized as Anna Comnena, was a Byzantine princess and author of the ''Alexiad'', an account of the reign of her father, the Byzantine emperor, ...

, daughter of Emperor Alexios. Previously, Emperor Alexios had been heavily defeated while trying to relieve a previous Norman siege of the same city in 1081. In this siege, Alexios chose not attempt to end the siege by means of a

pitched battle A pitched battle or set-piece battle is a battle in which opposing forces each anticipate the setting of the battle, and each chooses to commit to it. Either side may have the option to disengage before the battle starts or shortly thereafter. A ...

but attempted to weaken the Normans by dispatching sorties to occupy the passes in the Normans' rear and prevent them from foraging. As the siege continued, Alexios attempted to spread disease in the Norman camp and used

Greek fire Greek fire was an incendiary weapon used by the Eastern Roman Empire beginning . Used to set fire to enemy ships, it consisted of a combustible compound emitted by a flame-throwing weapon. Some historians believe it could be ignited on contact w ...

to burn down their siege engines. Finally, Bohemond sought terms which led to the

Treaty of Devol The Treaty of Devol ( el, συνθήκη της Δεαβόλεως) was an agreement made in 1108 between Bohemond I of Antioch and Byzantine Emperor Alexios I Komnenos, in the wake of the First Crusade. It is named after the Byzantine fortress of ...

, whereby Bohemond and the

Principality of Antioch The Principality of Antioch was one of the crusader states created during the First Crusade which included parts of modern-day Turkey and Syria. The principality was much smaller than the County of Edessa or the Kingdom of Jerusalem. It extende ...

became Byzantine vassals.

References

* * * 1107 in Europe 1108 in Europe 1100s in the Byzantine Empire Albania under the Byzantine Empire Dyrrhachium Dyrrhachium Dyrrhachium 1107 Dyrrhachium 1107 Alexios I Komnenos History of Durrës Dyrrhachium 1107 {{battle-stub