Cologne is the most populous city in the country with more than one million inhabitants Nordrhein-Westfalen as well as the fourth largest city in the Federal Republic of Germany after Berlin, Hamburg and Munich. Cologne is of international importance as an economic and cultural metropolis. The Carnival stronghold is also the seat of many associations and media companies with numerous television stations, music producers and publishing houses. In addition, the city counts mainly because of the significant Cologne Cathedral and its Romanesque churches, a city history of over 2000 years, numerous internationally important events as well as its cultural and culinary heritage make it the most important travel destinations in Europe.
Thanks to the University of Cologne (approx. 50.000 students), the Technical University of Cologne (approx. 25.000 students) and numerous other universities, it is also the largest educational and research location within the Metropolregion Rhein-Ruhr Cologne is also an important congress and fair locationwho have favourited Photo Fair photokina, the Confectionery fair and the video game fair gamescom are considered the world's leading trade fairs Art Cologne as the oldest art fair in the world.