Cologne the Central Franconian and Ripuarian dialect areas. The city's famous Cologne Cathedral ("Kölner Dom") is the seat of the Catholic Archbishop of Cologne. There are many institutions of higher education in the city, most notably the University of Cologne ("Universität zu Köln"), one of Europe's oldest and largest universities, the Technical University of Cologne ("Technische Hochschule Köln"), Germany's largest university of applied sciences, and the German Sport University Cologne ("Deutsche Sporthochschule Köln"), Germany's only sport university. Cologne Bonn Airport ("Flughafen Köln/Bonn") is Germany's seventh-largest airport and lies in the southeast of the city. The main airport for the Rhine-Ruhr region
Cologne leading galleries for postwar and contemporary art. Several orchestras are active in the city, among them the Gürzenich Orchestra, which is also the orchestra of the Cologne Opera and the WDR Symphony Orchestra Cologne ("German State Radio Orchestra"), both based at the Cologne Philharmonic Orchestra Building (Kölner Philharmonie). Other orchestras are the Musica Antiqua Köln and the WDR Rundfunkorchester Köln, and several choirs, including the WDR Rundfunkchor Köln. Cologne was also an important hotbed for electronic music in the 1950s (Studio für elektronische Musik, Karlheinz Stockhausen) and again from the 1990s onward. The public radio and TV station WDR was