The Federal City of Bonn (German pronunciation: [ˈbɔn]) is a city on the banks of the Rhine in the German state of North Rhine-Westphalia, with a population of 311,287. About 24 km (15 mi) south-southeast of Cologne, Bonn is in the southernmost part of the Rhine-Ruhr region, Germany's largest metropolitan area, with over 11 million inhabitants.
Together with the capital Berlin, the city is the de facto joint seat of government of Germany, with the President, the Chancellor, and many federal government ministries maintaining substantial presences in Bonn. The title of Federal City (German: Bundesstadt) reflects its important political status within Germany.
Founded in the 1st century BC as a Roman settlement, Bonn is one of Germany's oldest cities. From 1597 to 1794, Bonn was the capital of the Electorate of Cologne, and residence of the Archbishops and Prince-electors of Cologne. Composer Ludwig van Beethoven was born in Bonn in 1770. From 1949 to 1990, Bonn was the capital of West Germany, and it is here that Germany's present constitution, the Grundgesetz, was declared in 1949. From 1990 to 1999, Bonn served as the seat of government – but no longer capital – of reunited Germany.
The headquarters of Deutsche Post DHL and Deutsche Telekom, both DAX-listed corporations, are in Bonn. The city is home to the University of Bonn and a total of 19 United Nations institutions.