than to discover what the early Romans really thought about a god. In this lecture I am but humbly trying to do this last, and I may therefore leave etymology, with the mythology and philosophy of a later age, and confine myself to such facts of the cult of Janus as are quite undisputed. They will admit of being put together very shortly. The first and leading fact is that Janus was the first deity to be addressed in all prayers and invocations; of this we have abundant evidence, as also of the corresponding fact that Vesta came last.[248] Secondly, we know that he was the object of worship on the Kalends of January, and probably of every month, and that the sacrificing priest was in this case the _rex sacrorum_. Thirdly, we know that he had no temple until the year 260 B.C., but that he was associated with the famous gateway at the north-east end of the Forum--not a gate in the wall, but a symbolic entrance to the heart of the city, as the round temple of Vesta at the opposite end, with its eternal fire, was symbolic of the common life of the community. Fourthly, we know a few cult-titles of Janus, among them Clusius (or Clusivius), and Patulcius, in which the connection with gates is obvious; Junonius, which may have originated in the fact that Juno also was worshipped on the Kalends; Matutinus, which seems to be a late reference to the dawn as the opening or gate of the day, and Quirinus, which last is also almost certainly of late origin. Clusius and Patulcius are genuine old titles, if the text of the Salian hymn is rightly interpreted; so too is another, Curiatius, for it was used of the god only as residing in an ancient gateway near the Subura called the _tigillum sororium_.[249] These are all the most important facts we have to go upon; the double head of Janus on the earliest Roman _as_ is of uncertain origin, and Wissowa seems to have conclusively shown that this representation was not admitted to the gate called Janus Geminus until towards the close of the republican period.[250] The connection of the god with the fortress on the hill across the Tiber, which still bears his name, admits of no quite satisfactory explanation.