Fort Friedrichsburg or Feste Friedrichsburg was a fort in Königsberg, Germany. The only remnant of the former fort is the Friedrichsburg Gate in Kaliningrad, Russia.
Wikipedia https://en.wikipedia.org/wiki/Fort_Friedrichsburg
Address (Unnamed Road), Калининград, Russia
Coordinates 54°42'16.198" N 20°29'36.723" E
