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 the 11th century was not less than 600. The markets of Cologne had attracted many Jewish visitors who had partly stayed. Italian Jews are mentioned in the stories about the Crusaders in Cologne. The fact that the Jewish community was important is proved further by the statement in these Hebrew reports that out of Cologne there went forth "our brethren scattered over the earth support for their life and correct words of judgment". It means that the community was the center of Jewish life for all the communities of the area. During the Middle Ages, the Jewish community had been