Empire of Nicaea Timeline

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  • 1204 CE - 1222 CE
    Reign of Theodore I Laskaris over the Empire of Nicaea.
  • 1204 CE - 1261 CE
    The existence of the Empire of Nicaea, the Byzantine Empire in exile.
  • 1206 CE
    Theodore I Laskaris proclaims himself emperor of the Byzantine Empire (at this point only the Empire of Nicaea).
  • 1208 CE
    Theodore I Laskaris is anointed emperor by the patriarch-in-exile of Constantinople.
  • 1211 CE
    Battle of Antioch on the Meander, in which the Nicaean forces of Theodore I Laskaris defeat those of Seljuk Sultan Kaykhusraw I and kill him.
  • 1214 CE
    Nicaean Emperor Theodore I Laskaris and Latin Emperor Henry sign the Treaty of Nymphaeum, establishing peace between the two.
  • 1220 CE
    The Empire of Nicaea is officially recognized by Venice.
  • 1222 CE - 1254 CE
    Reign of John III Doukas Vatatzes of the Empire of Nicaea.
  • 1230 CE
    Battle of Klokotnitsa, in which the Bulgarian army under Tsar Ivan Asen II defeated Theodore Komennos Doukas, Despot of Epirus.
  • 1241 CE
    Death of Tsar Ivan Asen II.
  • 1242 CE
    John III Doukas Vatatzes conquers the city of Thessalonica.
  • 1242 CE
    The Empire of Thessalonica is forced to submit as a despotate to the Empire of Nicaea.
  • 1246 CE
  • 1250 CE
  • 1254 CE
    Death of John III Doukas Vatatzes.
  • 1254 CE - 1258 CE
    Reign of Theodore II Laskaris over the Empire of Nicaea.
  • 1258 CE - 1261 CE
    Reign of John IV Laskaris over the Empire of Nicaea.
  • 1259 CE
    Michael VIII Palaiologos makes himself co-emperor in Nicaea with John IV Laskaris.
  • 1259 CE
    Battle of Pelagonia, in which Michael VIII Palaiologos of the Empire of Nicaea defeated the combined forces of Sicily, the Latin Empire, the Latin kingdoms in Greece, and the Despotate of Epiros.
  • 1259 CE
    Battle of Pelagonia: Manfred of Sicily and William II of Villehardouin are defeated by the Empire of Nicaea. William is forced to cede the castles of Mystras, Maina, and Monemvasia.
  • 1261 CE
    Treaty of Nymphaeum, in which the Byzantine Empire grants Genoa mercantile concessions in exchange for naval support.
  • 1261 CE
    The Nicaean general Alexios Strategopoulos sneaks into Constantinople and recaptured it for the Empire of Nicaea.
  • 1261 CE
    Michael VIII Palaiologos enters Constantinople and re-establishes it as the Byzantine capital.

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