So much for the Roman citizen proper. Other elements of the population were the foreigners. At Rome these were exceedingly numerous, and the city may in this respect be called--as indeed it was called--a microcosm, a small copy or epitome of the Roman world. Gauls, Africans, Greeks, Jews, Syrians, and Egyptians were perhaps the most commonly to be seen, but particularly prominent were the Greeks and the Jews. The Greeks were recognised above all as the clever men, the artists, the social entertainers, and the literary guides. The Jews, who formed a sort of colony in what is now known as Trastevere--the low-lying quarter across the Tiber--were not yet the princes of high finance. As yet they were chiefly the hucksters and petty traders, notorious for their strange habits and for the fanaticism of their religion, which nevertheless exercised a strange potency and made many proselytes even in high places, especially among the women. Poppaea, the wife of Nero himself, is commonly considered to have been such a proselyte, although the strange notion that she herself was a Jewess is without any sort of foundation. It is a common error to suppose that the Jews came to Rome only after the destruction of Jerusalem. The dispersion had occurred long before Rome had anything to do with Judaea, and naturally the enterprising Jew was to be found in all profitable places, whether in Alexandria, Antioch, Smyrna, Corinth, Rome, or farther afield. In the political sense all these foreigners belonged to their own provinces and communities. They might be citizens there, but they were not citizens at Rome. At Rome they had no public claims and no official career, unless--as not seldom happened--they received, for some service or some distinction, the gift of the Roman citizenship. Sometimes the citizenship was given wholesale to a town, or even to a province. How the Hebrew father or grandfather of St. Paul became a Roman citizen, we do not know. Their own abilities or the emperor's favour might carry such citizens, or their children, up all the steps which were open to the ordinary Roman. After the foreigners come the slaves. At Rome itself they formed about one-third of the population. This is not the moment for any detailed account of their employment, their treatment, or their liberation.