Saint Castor of Karden (German: Kastor von Karden) was a priest and hermit of the 4th century who is venerated as a saint by the Catholic Church.

[1] At his ordination, Castor settled at Karden on the Moselle as a hermit with various companions, where they dedicated themselves to an ascetic life and established a small religious community.

[1] Castor died at Karden at an advanced age.

[2] By the year 791 AD, there was already a reliquary dedicated to Castor, which was translated to the Paulinuskirchen at Karden.

[2] In 836, the relics were translated to what became the Basilica of St. Castor at Koblenz by Archbishop Hetto of Trier.