The Hardenburg on the eastern edge of the Palatinate Forest near the Rhineland-Palatinate town of Bad Dürkheim is even as a ruin one of the mightiest castles of Palatinate. It was the residence of the Counts of Leiningen, who in 1725 moved to Schloss Dürkheim.
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Kreisstadt Bad Dürkheim: Burg Hardenburg Burgen in Rheinland-Pfalz: Burg Hardenburg Wolfgang Braun: Rekonstruktionszeichnung