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Plenar Herzog Ottos des Milden KGM W. Plenar Herzog Ottos des Milden Silber vergoldet Jaspis Bergkristall ber Pergamentmalereien Braunschweig br Niedersachsen um br Berlin aus dem Welfenschatz Inv Nr own User FA Welfenschatz Kunstgewerbemuseum Berlin Medieval book covers Treasure bindings works in Germany books Otto the Mild