Background
He was born in Nîmes and may have been the brother of Saint Leontius of Fréjus.
He was born in Nîmes and may have been the brother of Saint Leontius of Fréjus.
He lived in Marseilles. Castor founded the monastery of Manauque (Monanque) in Provence. He was subsequently made bishop of Apartment
He died of natural causes.
Saint John Cassian wrote the De institutis coenobiorum at the request of Castor. His feast day is September 2.
His relics are still preserved in the cathedral of Apt, of which he is one of the patrons.