Our view agrees with classic authority. Tacitus (xii. 24) describing the pomœrium or boundary of Roma Quadrata, which went round the base of the hill on the level below, thus showing its shape, says: "The first outline began at the Ox-Market, where still is to be seen the brazen statue of a bull, that animal being commonly employed at the plough. From that place a furrow was carried on of sufficient dimensions to include the great Altar of Hercules. By boundary stones, fixed at proper distances, the circuit was continued along the foot of Mount Palatine to the Altar of Consus, extending thence to the Old Curiæ; next, to the Chapel of the Lares." These buildings were built after Roma Quadrata, with the exception of the Altar of Hercules, and are mentioned by Tacitus to mark the line; they existed when he wrote. Ovid ("Fasti," iv. 825) says: "Pressing the tail of the plough, he traces out the walls with a furrow; a white cow with a snow-white bull bears the yoke." Dionysius (i. 88) says: "Romulus called the people to a place appointed, and described a quadrangular figure about the hill, tracing with a plough, drawn by a bull and a cow yoked together, one _continued_ furrow." Taking these authors for our guides, we can easily trace the line of the pomœrium. Commencing at the Forum Boarium, which site is well known, it went down to the Altar of Hercules, which must have also been in the Forum Boarium, "in the spot where a part of the city has its name derived from an ox" (Ovid, "Fasti," i. 581). Taking in this altar, it passed under the Palatine's southern side to the Ara Consi, which Tertullian ("De Spec." v.) tells us was buried in the circus at the first meta. It here turned to the east, passing along the valley which then existed, along our imaginary line; for it is ridiculous to suppose that it would have passed right across the Palatine had the hill been then what it is now. From the Altar of Consus it extended past the Old Curiæ, which we think may be seen in the tufa walls under the south end of the Palace of Domitian (19), then to the Chapel of the Lares, which stands at the head of the Sacra Via below the Palace of Domitian (17). "Ædem Larum in Summa Sacra Via" ("Mon. Ancyr."). "Ancus Martius (habitavit) in Summa Sacra Via, ubi ædes Larum est" (Solinus, i. 24). "Romulus built a temple to Jupiter, near the gate called Mugonia, which leads to the Palatine Hill from the Sacra Via" (Dionysius, ii. 30). The Sacred Way did not pass through the Arch of Titus, as is generally supposed, but passing by it led up to the Palatine--this can be seen by examining the stones--and was then called Clivus Palatinus. A large piece of the pavement still exists on the Palatine, leading up to the Ædem Larum, and which road is miscalled Nova Via. The road leading from the Arch of Titus to that of Constantine was called the Clivus Triumphalis.