The Siege of Antioch occurred in 1268 when the Mamelukes under Baibars finally succeeded in capturing the city of Antioch. Prior to the siege, the Crusader Principality was oblivious to the loss of the city, as demonstrated when Baibars sent negotiators to the leader of the former Crusader state and mocked his use of "Prince" in the title Prince of Antioch.

• http://en.wikipedia.org/wiki/Siege of Antioch (1268)