After the conquest of Constantinople, Michael proclaimed himself sole ruler, blinding and displacing the young emperor and marrying the remaining princesses to foreigners.
Eudoxia, still a child, married in 1261 in Constantinople with Count Pedro of the House of Ventimiglia and Tende (a region that retains the Byzantine double-headed eagle as a symbol), traveling then to Liguria.
In 1317, Lady Vataça established a small court in Santiago do Cacém castle, given to her by King Denis in 1310/15, where she dedicated herself to the administration of her large possessions until 1325 or 1332, when she followed Queen Elisabeth of Portugal to Coimbra.
She died there in 1336 and her impressive tomb in the Old Cathedral of Coimbra, attributed to the sculptor Mestre Pero, is surrounded by double-headed eagles, symbol of the Laskaris dynasty and the Byzantine Empire.
Her son Pedro Jordán de Urríes y Lascaris di Ventimiglia, Lord of Loarre and of Alquézar, was a Bailiff, a General in 1356 and a Royal Councilman of Aragon.