In general, Janus is at the origin of time as the guardian of the gates of Heaven: Jupiter himself can move forth and back because of Janus's working. In one of his temples, probably that of Forum Holitorium, the hands of his statue were positioned to signify the number 355 (the number of days in a lunar year), later 365, symbolically expressing his mastership over time. He presides over the concrete and abstract beginnings of the world, such as religion and the gods themselves, he too holds the access to Heaven and to other gods: this is the reason why men must invoke him first, regardless of the god they want to pray to or placate. He is the initiator of human life, of new historical ages, and financial enterprises: according to myth he was the first to mint coins and the as, first coin of the liberal series, bears his effigy on one face.