From 1233 onwards Antioch declined and appeared rarely in records for 30 years, and in 1254 the altercations of the past between Antioch and Armenia were laid to rest when Bohemond VI of Antioch married the then 17‑year‑old Sibylla of Armenia, and Bohemond VI became a vassal of the Armenian kingdom. Effectively, the Armenian kings ruled Antioch while the prince of Antioch resided in Tripoli. The Armenians drew up a treaty with the Mongols, who were now ravaging Muslim lands, and under protection they extended their territory into the lands of the Seljuq dynasty in the north and the Aleppo territory to the south. Antioch was part of this Armeno-Mongol alliance. Bohemond VI managed to retake Lattakieh and reestablished the land bridge between Antioch and Tripoli, while the Mongols insisted he install the Greek patriarch there rather than a Latin one, due to the Mongols attempting to strengthen ties with the Byzantine Empire. This earned Bohemond the enmity of the Latins of Acre, and Bohemond was excommunicated by the Patriarch of Jerusalem, Pope Urban IV, which was later suspended.