the 19th and 20th centuries; in the year 1900 approximately 422,709 people were registered as residents and by 1933 the population was already 625,000. The strongest growth was recorded from 1900 to 1910, with almost 100,000 new residents within the city limits. Although the city was overwhelmingly German-speaking, the ethnic composition based on heritage or place of birth was mixed. According to a statistical report from 2000, around 43% of all inhabitants in 1910 were born outside Silesia and migrated into the city, mostly from the contemporary regions of Greater Poland (then the Prussian Partition of Poland) or Pomerania. Poles and Jews were among the most prominent active minorities. Simultaneously, the city's territorial expansion and incorporation of surrounding townships further strengthened population growth. Following the end of the Second World War and post-1945 expulsions of the pre-war population, Wrocław became predominantly Polish-speaking. New incomers were primarily resettled from areas in the east which Poland lost (Vilnius and Lviv), or from other provinces, notably the regions of Greater Poland, Lublin, Białystok and Rzeszów. At the end of 1947, the city's population was estimated at 225,000 individuals, most of whom were migrants. German nationals who stayed were either resettled in the late 1940s and 1950s, or assimilated. Contemporary Wrocław has one of the highest concentration of foreigners in Poland alongside Warsaw and Poznań; a significant majority are migrant workers from Ukraine; others came from Italy, Spain, South Korea, India, Russia and Turkey. No exact statistic exists on the number of temporary residents from abroad. Many are students studying at Wrocław's schools and institutions of higher learning. Religion Wrocław's population is predominantly Roman Catholic, like the rest of Poland. The diocese was founded in the city as early as 1000, it was one of the first dioceses in the country at that time. Now the city is the seat of a Catholic Archdiocese. Prior to World War II, Breslau was mostly inhabited by Protestants, followed by a large Roman Catholic and a significant Jewish minority. In 1939, of 620,976 inhabitants 368,464 were Protestants (United Protestants; mostly Lutherans and minority Reformed; in the Evangelical Church of the old-Prussian Union), 193,805 Catholics, 2,135 other Christians and 10,659 Jews. Wrocław had the third largest Jewish population of all cities in Germany before the war. Its White Stork Synagogue was completed in 1840, and rededicated in 2010. Four years later, in 2014, it celebrated its first ordination