Qala'a Marqab / Margat

 castle, fortification, historic landmark

Margat, also known as Marqab (from the Arabic Qalaat al-Marqab, قلعة المرقب, "Castle of the Watchtower") was a Crusader fortress in modern Syria. It was one of the major strongholds of the Knights Hospitaller.

Margat is located on a hill about 500 metres above sea level, formed by an extinct volcano on the road between Tripoli and Latakia, overlooking the Mediterranean Sea. It was probably an ancient fortress, but earliest existing defences were built in 1062 by the Arabs, who continued to hold it within the Christian Principality of Antioch in the aftermath of the First Crusade. When the Principality was defeated at the Battle of Harran in 1104, the Byzantine Empire took advantage of their weakness and captured Margat from the Muslims. A few years later it was captured by Tancred, Prince of Galilee, regent of Antioch, and was incorporated into the Principality.

In the 1170s it was controlled by Reynald II Mazoir of Antioch as a vassal of the count of Tripoli; the fortress was so large that it had its own household officials and a number of rear-vassals. His son Bertrand sold it to the Hospitallers in 1186 as it was too expensive for the Mazoir family to maintain. After some rebuilding and expansion by the Hospitallers, it became their headquarters in Syria. Under Hospitaller control, its fourteen towers were thought to be impregnable; Saladin besieged the castle in 1188 but was unable to capture it, and it was one of the few remaining territories left in Christian hands after Saladin's conquests.