Diana (mythology) of the asylum. Worship of Diana probably spread into the city of Rome beginning around 550 BCE, during her Hellenization and combination with the Greek goddess Artemis. Diana was first worshiped along with her brother and mother, Apollo and Latona, in their temple in the Campus Martius, and later in the Temple of Apollo Palatinus. The first major temple dedicated primarily to Diana in the vicinity of Rome was the Temple of Diana Aventina (Diana of the Aventine Hill). According to the Roman historian Livy, the construction of this temple began in the 6th century BCE and was inspired by
Gallo-Roman culture in Roman terms, such as with Lenus Mars or Apollo Grannus. Otherwise, a Roman god might be paired with a native goddess, as with Mercury and Rosmerta. In at least one case – that of the equine goddess Epona – a native Gallic goddess was also adopted by Rome. Eastern mystery religions penetrated Gaul early on. These included the cults of Orpheus, Mithras, Cybele, and Isis. The imperial cult, centred primarily on the "numen" of Augustus, came to play a prominent role in public religion in Gaul, most dramatically at the pan-Gaulish ceremony venerating Rome and Augustus at the Condate