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Schwanenburg. Schwanenburg in Kleve en The HerzogWilhelmTor of the Schwanenburg in Cleves Paul Clemen Hrsg Die Kunstdenkmler der Rheinprovinz Bd Heft Die Kunstdenkmler des Kreises Kleve Schwann Dsseldorf author PDold Drawings of castles in North RhineWestphalia Schwanenburg Kleve
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