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 Old Testament, 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 (also known as "Saint Helen's Chapel") ordered to be built by Empress Consort Helena, mother of Constantine the Great, at the site where Moses is supposed to have seen the burning bush.
The living bush on the grounds is purportedly the one seen by Moses.
Structurally the monastery's king post truss is the oldest known surviving roof truss in the world.
The site is sacred to Christianity, Islam, and Judaism.

A mosque was created by converting an existing chapel during the Fatimid Caliphate (909–1171), which was in regular use until the era of the Mamluk Sultanate in the 13th century and is still in use today on special occasions.
During the Ottoman Empire, the mosque was in desolate condition; it was restored in the early 20th century.

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.

The monastery, along with several dependencies in the area, constitute the entire Church of Sinai, which is headed by an archbishop, who is also the abbot of the monastery.
The exact administrative status of the church within the Eastern Orthodox Church is ambiguous: by some, including the church itself, it is considered autocephalous, by others an autonomous church under the jurisdiction of the Greek Orthodox Church of Jerusalem.
The archbishop is traditionally consecrated by the Greek Orthodox Patriarch of Jerusalem; in recent centuries he has usually resided in Cairo.
 During the period of the Crusades which was marked by bitterness between the Orthodox and Catholic churches, the monastery was patronized by both the Byzantine emperors and the rulers of the Kingdom of Jerusalem, and their respective courts.

On April 18, 2017, an attack by the Islamic State group at a checkpoint near the Monastery killed one policeman and injured three police officers.
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 Old Testament, 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 (also known as "Saint Helen's Chapel") ordered to be built by Empress Consort Helena, mother of Constantine the Great, at the site where Moses is supposed to have seen the burning bush. The living bush on the grounds is purportedly the one seen by Moses. Structurally the monastery's king post truss is the oldest known surviving roof truss in the world. The site is sacred to Christianity, Islam, and Judaism.
A mosque was created by converting an existing chapel during the Fatimid Caliphate (909–1171), which was in regular use until the era of the Mamluk Sultanate in the 13th century and is still in use today on special occasions. During the Ottoman Empire, the mosque was in desolate condition; it was restored in the early 20th century.
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.
The monastery, along with several dependencies in the area, constitute the entire Church of Sinai, which is headed by an archbishop, who is also the abbot of the monastery. The exact administrative status of the church within the Eastern Orthodox Church is ambiguous: by some, including the church itself, it is considered autocephalous, by others an autonomous church under the jurisdiction of the Greek Orthodox Church of Jerusalem. The archbishop is traditionally consecrated by the Greek Orthodox Patriarch of Jerusalem; in recent centuries he has usually resided in Cairo.  During the period of the Crusades which was marked by bitterness between the Orthodox and Catholic churches, the monastery was patronized by both the Byzantine emperors and the rulers of the Kingdom of Jerusalem, and their respective courts.
On April 18, 2017, an attack by the Islamic State group at a checkpoint near the Monastery killed one policeman and injured three police officers.
Saint Catherine's Monastery