But if Citania knew nothing of Christianity there still remains one remarkable monument of the native religion. Among the ruins there long lay a huge thin slab of granite, now in the museum of Guimarães, which certainly has the appearance of having been a sacrificial stone. It is a rough pentagon with each side measuring about five feet. On one side, in the middle, a semicircular hollow has been cut out as if to leave room for the sacrificing priest, while on the surface of the stone a series of grooves has been cut, all draining to a hole near this hollow and arranged as if for a human body with outstretched legs and arms. The rest of the surface is covered with an intricate pattern like what may often be found on Celtic stones in Scotland. Besides this so-called Citania similar buildings have been found elsewhere, as at Sabrosa, also near Guimarães, but there the Roman influence seems usually to have been greater. (Fig. 1.) The Romans began to occupy the Peninsula after the second Punic war, but the conquest of the west and north was not completed till the reign of Augustus more than two hundred years later. The Roman dominion over what is now Portugal lasted for over four hundred years, and the chief monument of their occupation is found in the language. More material memorials are the milestones which still stand in the Gerez, some tombstones, and some pavements and other remains at Condeixa a Velha, once Conimbriga, near Coimbra and at the place now called Troya, perhaps the original Cetobriga, on a sandbank opposite Setubal, a town whose founders were probably Phoenicians. But more important than any of these is the temple at Evora, now without any reason called the temple of Diana. During the middle ages, crowned with battlements, with the spaces between the columns built up, it was later degraded by being turned into a slaughter-house, and was only cleared of such additions a few years since. Situated near the cathedral, almost on the highest part of the town, it stands on a terrace whose great retaining wall still shows the massiveness of Roman work.