Saint Catherine

The oldest record of monastic life at Sinai comes from the travel journal written in Latin by a woman named Egeria about 381-384. She visited many places around the Holy Land and Mount Sinai, .where, according to the Hebrew Bible, Moses received the Ten Commandments from God

The monastery was built by order of Emperor Justinian I (reigned 527-565), enclosing the Chapel of the Burning Bush ordered to be built by Helena, the mother of Constantine I, at the site where Moses is supposed to have seen the burning bush; the living bush on the grounds is purportedly the original. It is also referred to as "St. Helen's Chapel." The site is sacred to Christianity and Islam.
Saint Catherine's monastery, 1852
Patent of Mohammed

A Fatimid mosque was built within the walls of the monastery, but it has never been used since it is not correctly oriented towards Mecca.

During the seventh century, the isolated Christian anchorites of the Sinai were eliminated: only the fortified monastery remained. The monastery is still surrounded by the massive fortifications that have preserved it. Until the twentieth century, access was through a door high in the outer walls. From the time of the First Crusade, the presence of Crusaders in the Sinai until 1270 spurred the interest of European Christians and increased the number of intrepid pilgrims who visited the monastery. The monastery was supported by its dependencies in Egypt, Palestine, Syria, Crete, Cyprus and Constantinople..