Masjid al-Hisn

Masjid al-Hisn (مسجد الحصن) ("The Fortress Mosque") was built between 717 to 720CE by the Umayyad caliph Umar II, after he decided that Mopsuestia provided a key city to stop a potential Greek attack against Antioch.

A cistern within the structure was inscribed with Umar's full name, Umar ibn-'Abd-al-'Aziz.

The building fell into ruin during the reign of Al-Mu'tasim, approximately 120 years later.

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