Cologne (English: kə-LOHN; German: Köln [kœln] (listen); Kölsch: Kölle [ˈkœlə] (listen)) is the largest city of Germany's most populous state of North Rhine-Westphalia (NRW) and the fourth-most populous city in Germany. With 3.6 million people in the urban region and 1.1 million inhabitants within its city proper, Cologne is the largest city on the river Rhine and also the most populous city of both the Rhine-Ruhr Metropolitan Region and the Rhineland. Centered on the left bank of the Rhine, Cologne is about 35 kilometres (22 mi) southeast of NRW's state capital Düsseldorf and 25 kilometres (16 mi) northwest of Bonn. It is classified as a world city by GaWC.
The city's medieval Catholic Cologne Cathedral (Kölner Dom) is a globally recognized landmark and one of the most visited sights and pilgrimage destinations in Europe. There are many institutions of higher education in the city, most notably the University of Cologne, one of Europe's oldest and largest universities; the Technical University of Cologne, Germany's largest university of applied sciences; and the German Sport University Cologne. It hosts three Max Planck science institutes and is a major research hub for the aerospace industry, with the German Aerospace Center and the European Astronaut Centre headquarters. It also has significant chemical and automobile industry. Cologne Bonn Airport is a regional hub, the main airport for the region is Düsseldorf Airport.
Cologne was founded and established in Germanic Ubii territory in the 1st century AD as the Roman Colonia Agrippina, hence its name (Augusta Ubiorum was also used). "Cologne", the French version of the city's name, has become standard in English as well. Cologne functioned as the capital of the Roman province of Germania Inferior and as the headquarters of the Roman military in the region until occupied by the Franks in 462. During the Middle Ages the city flourished as being located on one of the most important major trade routes between east and western Europe (including the Brabant Road, Via Regia and Publica). Cologne was a free imperial city of the Holy Roman Empire and one of the major members of the trade union Hanseatic League. It was one of the largest European cities in medieval and renaissance times.
Prior to World War II, the city had undergone occupations by the French (1794-1815) and the British (1918–1926), and was part of Prussia since 1815. Cologne was one of the most heavily bombed cities in Germany during World War II. The bombing reduced the population by 95%, mainly due to evacuation, and destroyed almost the entire millennia-old city centre. With restoring only major historic landmarks like city gates and churches (31 of them being Romanesque), the post-war rebuilding has resulted in a very mixed cityscape.
Cologne is a major cultural centre for the Rhineland; it hosts more than 30 museums and hundreds of galleries. Exhibitions range from local ancient Roman archeological sites to contemporary graphics and sculpture. The Cologne Trade Fair hosts a number of trade shows such as Art Cologne, imm Cologne, Photokina and Gamescom, a leading video games fair.
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