SaarLorLux
Rhineland-Palatinate is one of the 16 Bundesländer (federal states) of Germany. It has an area of 19,846 km² and about 4.048 million inhabitants. The capital is Mainz. The federal state of Rhineland-Palatinate was established on 30 August 1946.
Treis-Karden
Beginning in 1794, both centres lay under French rule. In 1815 they were assigned to the Kingdom of Prussia at the Congress of Vienna. Since 1946, they have been part of the then newly founded state of Rhineland-Palatinate. On 7 June 1969, the two centres, until then each a separate municipality, were merged to form the new municipality of Treis-Karden.