Friedrichsburg

Friedrichsburg (German for "Frederick's castle") may refer to:
 * Fort Friedrichsburg in Königsberg, Prussia
 * Groß Friedrichsburg, colonial fort in Ghana
 * Friedrichsburg, a castle which preceded Mannheim Palace
 * a part of Hessisch Oldendorf, Hesse
 * a former palace in Lampertheim, Hesse