Ms. 17 fol. 289 Introit for the feast of St. Castor, from 'Troparium Aptense'
French School, (11th century); French. Medium: vellum. Date: 11th Century. Introit de la fete de Saint Castor; introit is a Gregorian chant; Provenance: Cathedral of St. Anne, Apt, France / Giraudon. Photographic Rights The Bridgeman Art Library.