Bede, Beda, or Baeda, Saint (672 or 673–735), an English scholar, called "the Venerable Bede." He was probably the most learned man of his day. His Ecclesiastical History of the English People is his most important work and the chief source of English history from 587 to 731.
Bede was one of the greatest students of chronology in the Middle Ages. He popularized the system—formulated in the sixth century—of dating events from the birth of Christ and designating them Anno Domini (A.D.), "in the year of our Lord." He introduced the concept of B.C. , "before Christ," when dating the landing of Julius Caesar in Britain.
Bede lived most of his life in the Benedictine monastery at Jarrow in northern England. There he studied, taught, and wrote, and he helped make Jarrow and its associated monastery, Wearmouth, the greatest centers of learning in England. At 30 he became a priest. Bede wrote about 40 works, in Latin, mainly on history, theology, and science. Roman Catholics celebrate his feast day on May 25; Anglicans, on May 27.Saint Bede