Lucia of Segni, also called Lucienne, was a 13th-century princess and countess and later regent of the Principality of Antioch and County of Tripoli.
[1] Princess Lucia may have influenced the appointment of the new Greek Orthodox patriarch of Antioch, David, in c. 1240,[4] and she had her brother Paul installed as the bishop of Tripoli.
Such was her unpopularity that the young Bohemond asked Pope Innocent IV to be declared of age a few months early.
[6] King Louis IX of France, who was in the Latin East on the Seventh Crusade and encamped in Jaffa, mediated in the dispute between mother and son.
[6] She nevertheless succeeded in keeping Romans in important posts after her regency, leading to an unsuccessful baronial rebellion against her son.