The German empress "Kaiserin-Augusta" from "Sachsen-Weimar-Eisenach" engaged the prussian horticulturists "Peter-Joseph Lenné" and "Hermann Fürst von Pückler-Muskau" to arrange and design the left rhine riverbank in Koblenz. Many art monuments edged the 3,5 kilomerters long promenade, but most of them were destroyed in World War II...