Oswald builds the first minster of stone at York.
634. Death of Abu-Bekr; accession of Omar as head of the Saracens.
635. Defeat of the Welsh by the English at Heavenfield.
636. The Roman army is overcome by the Saracens. See [THE SARACEN CONQUEST OF SYRIA], iv, 247.
637. Emesa, Balbec, and Jerusalem taken by the Saracens.
638. Heraclius, unable to resist the Mahometans, retires to Constantinople, where he publishes his Ecthesis.
Death of Dagobert; his two sons succeed, Clovis to Neustria and Burgundy, Sigebert to Austrasia.
640. Capture of Cæsarea. Invasion of Egypt by Amru, the general of Omar. See [SARACENS CONQUER EGYPT], iv, 278.
641. Death of Heraclius, Emperor of the East; three rival emperors succeed; accession of Constans II.
The Sassanian kingdom ends.