Numa Pompilius, legendary king of Rome, successor to Romulus. His consort, the nymph Egeria, was said to have aided him in his rule. The origin of Roman ceremonial law and religious rites was ascribed to him. Among other achievements, he was supposedly responsible for the pontifices, flamens (sacred priests), vestal virgins, worship of Terminus (the god of landmarks), the building of the temple of Janus, and the reorganization of the calendar into days for business and holidays.