Assertion: empire's reign | /r/CapableOf | become on 29 may
Facets:
value: after dying in battle
type: TEMPORAL
Source sentences:
text: The Eastern Roman Empire, also called the Byzantine Empire by later historians, continued to exist until the reign of Constantine XI Palaiologos who became the last Roman Emperor on 29 May 1453 after dying in battle during the Siege of Constantinople against Mehmed II or "the Conqueror" and his Ottoman forces, ending the Byzantine Empire, though Mehmed II would himself also claim the title of caesar or Kayser-i Rum in an attempt to claim a connection to the Roman Empire.