before 1220: Birth of Eirene
c. 1240: Marriage to John Kantakouzenos
before 1257: Death of John Kantakouzenos
1261 or earlier: Eirene becomes a nun under the name Eulogia
1273: She is against Michael's VIII policy regarding the Union of the Churches
1276: Attempt to turn the Egyptian sultan against Byzantium
1284: Death of Eirene-Eulogia