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Strebewerk. Querschnitt der Kathedrale von Reims Quelle Wilhelm Lbke Max Semrau Grundri der Kunstgeschichte Paul Neff Verlag Esslingen Auflage Public Domain de PHansen Rainer Zenz de PDold Original upload log page de Strebewerk Rainer Zenz bytes no der Kathedrale von Reims Quelle Wilhelm Lbke Max Semrau Grundri der Kunstgeschichte