Events relating to religion

St Benedict founds a monastery at Monte Cassino and writes a Rule for the monks which becomes the basis of the Benedictine order

Christianity reaches the kingdom of Dongola, in present-day Sudan

St Columba establishes a monastery on the island of Iona, from which Celtic Christianity is carried to Scotland and northern England

St David founds monasteries in Wales and makes his base at Mynyw, a place now known after him as St David's

The word filioque ('and from the Son') becomes a major bone of contention between the Roman Catholic and Eastern Orthodox churches

Augustine, arriving with a party of monks from Rome, reaches Canterbury and is well received by the pagan king of Kent

Ritual intoning of the psalms, derived from Jewish synagogues, is formalized in Christian worship as Gregorian chant

The walls of caves at Ajanta are profusely decorated with Buddhist murals

Muhammad begins preaching in Mecca the message of Allah, dictated to him by the archangel Gabriel

When the Persians sack Jerusalem, they carry off to Ctesiphon Christianity's most sacred relic - the True Cross

Muhammad departs from Mecca and settles in Medina, in the event known as the Hegira

The year of the Hegira (Muhammad's move from Mecca to Medina) becomes Anno Hegirae or AH1, the first year in Muslim chronology

Mecca becomes the holy city of Islam and soon all Arabia accepts the new religion

The death of Muhammad at Medina is followed by the election of the first caliph, Abu Bakr, a father-in-law of the prophet

Omar, another father-in-law of Muhammad, is elected as the second Muslim caliph (the word means 'sucessor to the Messenger of God')

Within two years of the death of Muhammad, the Arabs surge north into the Syrian desert

After the assassination of Omar, Othman is elected as the third Muslim caliph

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