Images of Köln, Augustusburg and Falkenlust Palaces, Bonn and Düsseldorf. June 2018. “Cologne (German: Köln) is the largest city of Germany’s most populous federal state of North Rhine-Westphalia. Cologne was founded and established in Ubii territory in the 1st century AD as the Roman Colonia Claudia Ara Agrippinensium, the first word of which is the […]