Saint Catherine's Monastery (Greek: Μονὴ τῆς Ἁγίας Αἰκατερίνης) lies on the Sinai Peninsula, at the mouth of an inaccessible gorge at the foot of modern Mount Sinai in Saint Catherine at an elevation of 1 550 meters. The monastery is Greek Orthodox and is a UNESCO World Heritage Site. According to the UNESCO report (60 100 ha / Ref: 954) and website below, this monastery has been called the 'oldest working Christian monastery' in the world – although the Monastery of Saint Anthony, situated across the Red Sea in the desert south of Cairo, also lays claim to that title.