The presence of Jews on the Italian peninsula can be traced back as far as 200 BCE during the late Roman-Republican time period. Italian Jewry is especially diverse, comprising a mix of Italian, Sephardic, Ashkenazic, Persian and Libyan Jews. The 27,300 Jews living in Italy today form a thriving community, which is concentrated in the major cities of Rome, Milan, Turin, Florence and Leghorn (Livorno). Interest in Jewish culture is wide-spread among the wider Italian population, though knowledge about Judaism is often quite limited. Kosher food is available in the main cities that have large communities. The representative body of Italian Jewry is the Unione delle Comunità Ebraiche Italiane (UCEI), the Union of the Italian Jewish Community – the Italian affiliate of the World Jewish Congress.