Saint Isidore of Seville

Bishop and Doctor of the Church

Feast Day

April 4

Life

560–636

Canonized

1598

Doctor of the Church

1722

Born

Cartagena, Hispania (modern Spain)

Isidore was born about 560 in Cartagena into a family of four future saints — his elder brothers Leander and Fulgentius and his sister Florentina. He was educated by Leander, whom he eventually succeeded as Archbishop of Seville about 600. He held that see for nearly four decades, presiding over the Second Council of Seville (619) and the Fourth Council of Toledo (633) and consolidating the catechesis of the Visigothic kingdom after its turn from Arianism to Catholic orthodoxy.

Isidore's principal work is the Etymologiae, a twenty-book encyclopaedia synthesising the surviving knowledge of late antiquity — grammar, rhetoric, theology, geography, medicine, agriculture, music, architecture, and the trades. For nearly a thousand years it served as the standard reference work of the medieval West. He also produced histories of the Goths, treatises on the liturgy, and biblical commentaries.

He died on April 4, 636 and was canonised by Pope Clement VIII in 1598. Pope Innocent XIII declared him a Doctor of the Church in 1722. In the late 1990s the Spanish Episcopal Conference proposed him as the patron of the Internet, citing his encyclopaedic effort to gather and order all human knowledge. The patronage is widely accepted in popular Catholic devotion and is referenced in the Pontifical Council for Social Communications document on the Church and Internet (2002), though no formal universal decree of patronage has been promulgated by the Holy See.