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 Mount Sinai in Saint Katherine city in Egypt. The monastery is Greek Orthodox and is a UNESCO World Heritage Site. According to the UNESCO report (60100 ha / Ref: 954) and website hereunder, 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 holds claim to that title.