The history of the Jews in the Roman Empire traces the interaction of Jews and Romans during the period of the Roman Empire (27 BC – 476 AD). A Jewish diaspora had migrated to Rome and to the territories of Roman Europe from the land of Israel, Anatolia, Babylon and Alexandria in response to economic hardship and incessant warfare over the land of Israel between the Ptolemaic and Seleucid empires from the 4th to the 1st centuries BC. In Rome, Jewish communities thrived economically. Jews likely became a significant part of the Roman Empire's population in the first century AD, though there is no agreement in academia about the exact numbers and most numbers are speculative at best.
Roman general Pompey conquered Jerusalem and its surroundings by 63 BC.