Alexios I Komnenos (Alexius Comnenus) was emperor of the Byzantine Empire from 1081 to 1118 CE. Regarded as one of the great Byzantine rulers, Alexios defeated the Normans, the Pechenegs, and, with the help of the First Crusaders, the Seljuks to put the empire back on its feet after years of decline. He would found the Komnenoi dynasty which included five emperors who ruled until 1185 CE. The emperor's life was recorded in the Alexiad, written by his daughter Anna Komnene.
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Timeline
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1078Future Byzantine emperor Alexios I Komnenos marries Irene Doukaina.
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1081 - 1082The Normans, led by Robert Guiscard, attack Byzantine Greece.
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Apr 1081 - Aug 1118Reign of Byzantine emperor Alexios I Komnenos.
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1082Byzantine emperor Alexios I Komnenos grants trade access and privileges to the Venetians in return for naval support.
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1084The Normans defeat a Venetian naval force, allies of the Byzantine Empire.
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1085Alexios I Komnenos recaptures Dyracchion from the Normans.
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1087 - 1090The Pechenegs attack Byzantine Thrace.
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29 Apr 1091A Byzantine army, with Cumans as allies, defeats the Pechenegs at the battle of Mount Lebounion.
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1092Alexios I Komnenos introduces the electrum hyperpyron coin (worth one-third of a gold nomisma).
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1095Byzantine emperor Alexios I Komnenos quashes a rebellion led by Nikephoros Diogenes.
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Mar 1095Byzantine emperor Alexios I Komnenos appeals to the west for aid against the Seljuks.
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1097The First Crusaders arrive at Constantinople.
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1097The First Crusaders capture Nicaea.
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3 Jun 1098The First Crusaders capture Antioch after an 8-month siege.
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1107The Normans, led by Bohemund, besiege Dyracchion.
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1108The Treaty of Devol is signed between the Byzantine Empire and the Normans, removing any Norman threat from the empire's territory.
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15 Aug 1118Byzantine emperor Alexios I Komnenos dies of natural causes.
