• Born: Abt 1204, Courtenay, Galinois, France
• Married: 1219
• Died: Sep 1228, Nicaea, Bithynia

  Research Notes:

Georgius Akropolites records that "Theodorum Lascarim imperatorem" married "sorore Italorum principis Roberto…et Erico patruo successerat" after repudiating his second wife. Ephræmius records the marriage of "imperatori Lascari" and "Petri Maria filia", recording that his first wife had died and that he had repudiated his second wife "Cilice-gente natam". The Chronicle of Alberic de Trois-Fontaines names "Lascarus Grecus…imperator Nicee" as third husband of "secundam filiarum eius [Namucensis comitis Petri] Sibiliam" but confuses Sibylle with her younger sister Marie. Her marriage may have been proposed by Emperor Theodoros, during the interregnum which followed the disappearance of her father, with a view to his taking over the Latin empire himself but the statements of contemporary chroniclers are confusing.

Regent of Nikaia 1222. She was chosen as regent of Constantinople by the barons in 1228 on the death of her brother Emperor Robert, and styled herself "Empress". ¹