The ancient Romans were tolerant conquerors, at least in matters of religion, as suggested by their construction of the Pantheon in Rome, which, as its name [“All Gods”] suggests, co-recognized and co-celebrated religions from all around the Empire. The Romans allowed great religious freedom, with their only requirement being public expressions of respect for the imperial Emperor-God cult. It was therefore left up to the Gallo-Roman citizen to syncretize Gallic deities with Roman deities, or even to practice new cults imported from the East. On this spiritually rich and open cultural terrain, one of these cults was to gradually and lastingly take root: Christianity.