Masjid al-Hisn was built by a caliph who ruled between what years ?
Masjid al-Hisn: Masjid al-Hisn (Arabic: مسجد الحصن‎ ‎ , "The Fortress Mosque") was built between 717 and 720 CE by the Umayyad caliph Umar II, as part of his conversion of Mopsuestia (in present-day southeastern Turkey) into a military base to shield Antioch from a potential Greek attack. Umar II: Umar ibn Abd al-Aziz (2 November 682 (26th Safar, 63 AH) – February 720 (16th Rajab, 101 AH)) (Arabic: عمر بن عبد العزيز‎ ‎ ) was an Umayyad caliph who ruled from 717 to 720.
i don't know