Masyaf Castle is located in the town of Masyaf in Hama Governorate, Syria. The castle dates to the Aramaic Era (8th Century BC), with the latest building phases dating to the Ismaili occupation in the 12th century. The citadel became famous as the stronghold from which Rashid ad-Din Sinan, known as the Old Man of the Mountain ruled. He was a leader of the Syrian wing of the Hashshashin sect and a figure in the history of the Crusades.
In popular culture, Masyaf is known for its appearance in the Assassin's Creed video game series.