Abstract El-Gendi Fortress is a unique geo-archaeological site in Sinai, Egypt. It reflects the progress of Islamic military architecture during Saladin’s reign (Salah ad-din al Ayyubi), founder Ayyubid dynasty (1174-1260AD). The fortress's location met two major geo-criteria. One geographical; it located on mound 655 m above sea level (a.s.l) and 152 El-Tih El-plateau; this elevation contribut...