Schloss Drachenburg is a private villa in palace style. It was completed in only 2 years (1882–84) on the Drachenfels hill in Königswinter, a Rhein town near Bonn in Nordrhein-Westfalen, Northwestern Germany. Baron Stephan von Sarter (1833–1902), a broker and banker, planned to live there, but never did. Today the Palace is in the possession of the State Foundation of North Rhine-Westphalia. It is served by an intermediate station on the Drachenfels Railway.
Official site: https://www.schloss-drachenburg.de/index.php/en/