At the foot of the hill is the famous Fontebranda, with its colonnade of three arches and its four lions' heads. Although the first certain mention of it is in a document of 1081, and in its present form it only dates from the middle of the thirteenth century, the fountain has been famous throughout Tuscany from time immemorial. Possibly, when Siena was the Roman colony of the Sena Julia, the soldiery of the legions drank from its waters; before them, the fair-haired Senonian Gauls--if we accept that form of the legend of the foundation of the city--may have lingered a moment by it as they followed Brennus in his march to Rome. It hardly needs the adventitious fame that has accrued to it from the supposition--stated as a fact by the earliest commentators, but at present generally rejected by scholars--that it is the Fonte Branda recorded by Dante in the thirtieth canto of the _Inferno_, for whose waters, even to cool the burning thirst of Hell's foulest circle, Maestro Adamo would not have given the sight of his aristocratic seducers sharing his agony. There is a curious tradition that certain streets of Siena were--or possibly still are--infested by were-wolves, who rush through the city at night, and throw themselves into Fontebranda to recover human form.[106] Be that as it may, Fontebranda gives its name to the whole of the picturesque district--"il Rione di Fontebranda"--below the two hills upon which the Duomo and San Domenico respectively stand. The valley is still, as in St Catherine's days, the haunt of the tanners and the dyers, and redolent of that peculiar odour of the curing of hides that ever after haunts the lover of Siena.