(Saint's day: Feb 13). According to a vita from the High Middle Ages, Castor came from Aquitania and was a contemporary of Bishop Maximinus of Trier (died 346). He became priest and lived as a recluse in Karden (Mosel), where his remains were discovered under Bishop Weomad (died 791) and interred in the nearby Paulinus Church (renamed after Castor in ¶ the 10th/11th cent.); in 836, Archbishop Hetti (died 847) transferred some of them to the collegiate church built by him in Koblenz.
ActaSS Febr. II, 1658, 662–666
MGH.SS II, 1829, 603