St. Ildefonso, Archbishop of Toledo. He was born to a noble family of Toledo in 607 and in an early age became a monk in Agli, near Toledo. He was a nephew of Saint Eugene of Toledo ans studied in Seville under Saint Isidore. He founded and endowed a monastery of nuns; about 630 he was ordained a deacon, later became Abbot of Agli, and in this capacity was one of the signatories, in 653 and 655, at the Eighth and Ninth Councils of Toledo. In 657 he became Archbishop of Toledo and governed the Church of Toledo for nine years. He was a noted religious writer., especially on Our Lady, and played the main role in the unification of the Spanish liturgy. He died January 23, 667 and was buried in the Basilica of Saint Leocadia.
See: El Greco St. Ildefonso. St. Ildelfonso.
Bartolomé Esteban Murillo Chasuble of St. Ildefonso.
Diego Velázquez. St. Idelfonso Receiving the Chasuble from the Virgin.
The Oxford Dictionary of Saints (Oxford Paperback Reference) by David Hugh Farmer. Oxford University Press, 2003.