The temple of Saturn, though its ruins on the Forum Romanum are impressive, presents many problems in architecture and planning. It fronted on an important square, the Area Volcani, where there were a number of sacred monuments and where four important streets and a stair to the Capitoline converged. But the principal visual relation of the temple was originally to the temple of Jupiter Optimus Maximus on the Capitoline hill above it. The problem of the form and location of the old Aerarium cannot be completely resolved without more evidence than is available, but the reconstruction of the approach to the temple as rebuilt by Munatius Plancus offered by Lugli and now widely accepted must be discarded. It depends in large part on a misreading of a lost fragment of the Marble Plan; this is shown to have been erroneously assigned to this part of the Forum and may belong to the temple of Venus Verticordia near the Circus Maximus. The evidence for Lugli's Aerarium has also been misinterpreted by him. Livy records the building of a porticus in 174 B.C. that ran from the temple of Saturn in Capitolium to a senaculum and curia. It is argued here that this could not have run up along the Clivus Capitolinus but must have run across the northwest end of the Forum to the Curia Hostilia and made a dramatic backdrop to the Forum. Our ancient sources agree that, next to Vesta's, Saturn's was the oldest temple in the neighborhood of the Forum Romanum, but there is no agreement as to how its location is properly designated or when it was built. Macrobius (1.8.1) cites Varro as saying the temple was ad forum and the contract for its construction let by L. Tarquinius, the last of the kings. Dionysius (6.1.4) knows the same tradition. Macrobius is aware of another tradition that Tullus Hostilius dedicated a shrine to Saturn as a victory monument following his third triumph, over the Sabines, and then instituted the Saturnalia. But he seems to feel this need not have been the temple we know. For one thing Tullus' dedication was a fanum, not an aedes, and its whereabouts is not clearly stated. For another, Saturn also had an altar ante senaculum that seems to have had no connection with the temple; the worship at the altar was Graeco ritu and believed to date from time immemorial, primum a Pelasgis, post ab Hercule (Macrobius 1.8.2). We may agree that Tullus Hostilius is not apt to have built a public temple of no obvious utilitarian purpose as a victory monument; that is the gesture of a later
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