Isidore of Seville c. 560 – 636

Isidore of Seville was a Spanish bishop, encyclopedist, and the last of the Latin Fathers of the Church. Presiding over Visigothic Spain during the long transition from late antiquity to the early Middle Ages, he set himself the task of preserving the intellectual heritage of the classical world for future generations. His twenty-volume Etymologiae compiled the available learning of his age in an accessible form and remained a standard reference work throughout the Middle Ages. He has been proposed in modern times as the patron saint of the internet for his encyclopedic ambitions.

Isidore of Seville was born around 560, almost certainly at Cartagena, into a noble Hispano-Roman family driven into exile in Seville by the Byzantine reconquest of the south-east of the Iberian peninsula. He was educated by his elder brother Leander, archbishop of Seville, and on Leander's death around 600 succeeded him in the see. He would govern the Visigothic Church for more than thirty years and preside at the Second Council of Seville (619) and the great Fourth Council of Toledo (633).

His writings are encyclopedic in ambition. The Etymologies, in twenty books, organizes the entire knowledge of late antiquity around the supposed etymological origins of words and remained the standard reference work of medieval Western Europe for nearly a millennium. Beyond it stand the Sentences, the first systematic Latin treatment of dogmatic and moral theology; On the Nature of Things; On the Catholic Faith Against the Jews; the Chronicle and the History of the Goths; the Differences; and the De Viris Illustribus.

Isidore was the principal mediator of classical learning to the early medieval West and a central architect of Visigothic Spain's distinctive cultural and ecclesiastical synthesis. He died at Seville in April 636. He was canonized as a saint in 1598 and proclaimed a Doctor of the Church in 1722, and is the patron of the Internet.