Isidore of Seville
560 — 636 · Feast day: April 4
Born in Cartagena around 560 and educated by his brother St. Leander, Isidore succeeded Leander as Archbishop of Seville around 600 and led the Spanish Church for more than three decades. His Etymologiae — a twenty-volume encyclopedia drawing on hundreds of classical sources — became the standard reference work of the Middle Ages and preserved texts that would otherwise have been lost entirely.