Numa Pompilius may never have existed, but the Romans looked back to him as the founder of their religion. According to Roman myth, Numa became the second king of Rome after Romulus was snatched up to Heaven to become the god Quirinus, or according to another version, murdered by the senators. He was credited with reforming the ritual calendar of Rome and establishing the priesthoods and the cult of Vesta. Before Numa, Rome had used a calendar of ten months, beginning with March, which it took over.....