Editing History of Pittsburgh (section)

===New immigrants and migrants===
Between 1870 and 1920, the population of Pittsburgh grew almost sevenfold, with a large number of European immigrants arriving to the city. New arrivals continue to come from Britain, Ireland, and Germany, but the most popular sources after 1870 were poor rural areas in southern and eastern Europe, including Italy, the Balkans, the Austro-Hungarian Empire, and the Russian Empire. Unskilled immigrants found jobs in construction, mining, steel mills and factories. They introduced new traditions, languages, and cultures to the city, creating a diversified society as a result. Ethnic neighborhoods developed in working-class areas and were built on densely populated hillsides and valleys, such as [[South Side (Pittsburgh)|South Side]], [[Polish Hill]], [[Bloomfield (Pittsburgh)|Bloomfield]], and [[Squirrel Hill]], home to 28% of the city's almost 21,000 Jewish households.<ref>{{cite web |title=The 2002 Pittsburgh Jewish Community Study |url=http://www.ujfpittsburgh.org/page.aspx?ID=46650 |publisher=United Jewish Federation of Pittsburgh |date=December 2002 |access-date=November 6, 2008 |archive-date=March 10, 2016 |archive-url=https://web.archive.org/web/20160310045941/http://ujfpittsburgh.org/page.aspx?id=46650 |url-status=dead }}</ref> The [[Strip District (Pittsburgh)|Strip District]], the city's produce distribution center, still boasts many restaurants and clubs that showcase these multicultural traditions of Pittsburghers.<ref name="Galloway"/>