Demographics of Cologne and on 1 April 1888 ended in a first major incorporation. The territorial expansion, beginning in the late 19th century, were significant marks for the city's population growth. Major communal reorganizations took place in 1910, 1914, 1922 and 1975. Demographics of Cologne Cologne () is Germany's fourth-largest city and the largest city in the Rhineland. As of 31 December 2011, there were officially 1,017,155 residents. The city is center of the Cologne/Bonn Region with around 3 million inhabitants (including the neighboring cities of Bonn, Hürth, Leverkusen, and Bergisch Gladbach). The walls of Colonia Agrippina covered an area of 96.8 hectares,
History of the Jews in Cologne library of Middle Ages. After the massacre of the Jews in York, England in 1190, a number of Hebrew books from there were brought to and sold in Cologne. There are a number of remarkable manuscripts and illuminations prepared by and for Jews of Cologne during the 12th to the 15th centuries and now kept in various libraries and museums throughout the world. According to the Jewish Encyclopedia, Cologne was a center of Jewish learning, and the "wise of Cologne" are frequently mentioned in rabbinical literature. A characteristic of the Talmudic authorities of that city was their liberality. Many liturgical