Trapessac () is a medieval fortress located 4 km north of the town of Kırıkhan in Hatay Province, Turkey. Trapessac was constructed in the 11th century by the Knights Templar and, together with the nearby fortress at Bagras, guarded the Syrian Gates, the principal pass between the coastal region of Cilicia and inland Syria. In 1280, the fortress was temporarily regained by Abaqa Khan when he advanced to sack Aleppo, only to be abandoned when he withdrew from Syria.