Latins of Acre, and Bohemond was excommunicated by the Patriarch of Jerusalem, Pope Urban IV, which was later suspended. Fall of Antioch In 1259 the Mongols captured the Syrian city of Damascus, and eventually in 1260, Aleppo. The Mamluk sultan Saif ad-Din Qutuz looked to ally with the Franks, who declined. In September 1260, the Mamluks defeated the Mongols at the Battle of Ain Jalut, shortly after Qutuz was assassinated at Al-Salihiyya, and according to various sources his successor Baibars was involved in his murder. (Baibars "came to power with [the] regicide [of Qutuz] on his conscience" according to Tschanz.) Despite this, Baibars was named sultan, and in 1263 sacked Nazareth, threatened Antioch with invasion, and appeared before the walls of Acre. In January 1265, Baibars launched an offensive against the Latins, starting with Acre, the capital of the remnant of the Kingdom of Jerusalem, but was unable to take it. He nevertheless defeated the Crusaders in many other battles in Arsuf, Athlith, Haifa, and so on. In 1268, Baibars besieged Antioch, capturing the city on May 18. Baibars promised to spare the lives of the inhabitants, but broke his promise and razed the city, killing or enslaving nearly the entire population upon their surrender. Antioch's ruler, Prince Bohemond VI was then left with no territories except the County of Tripoli. Without any southern fortifications and with Antioch isolated it could not withstand the onslaught of resurgent Muslim forces, and with the fall of the city, the remainder of northern Syria eventually capitulated, ending the Latin presence in Syria. The Mamluk armies killed or enslaved every Christian in Antioch. In 1355 it still had a considerable population, but by 1432 there were only about 300 inhabited houses within its walls, mostly occupied by Turcomans. Ottoman Period Antioch was incorporated into the Ottoman Empire with the conquest of Syria in 1516. It formed a sub-province (sancak) or tax collectorship (muhassıllık) of the province of Aleppo (Aleppo Eyalet). Beginning in the mid-18th century, the district witnessed an influx of Alawite settlers coming from the Latakia area. The famous Barker family of British consuls had a summer home in Suwaydiyya (today's Samandağ), at the mouth of the Orontes River, in the 19th century. Between 1831 and 1840, Antioch was the military headquarters of Ibrahim Pasha of Egypt during the Egyptian occupation of Syria, and served as a model site for the modernizing reforms