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CHNB Diessenhofen von Nordwesten im Mittelgrund Kloster Sankt Katharinental Collection Gugelmann GSGUGEBLEULERb.tif Information Creator Johann Ludwig Bleuler Creator Friedrich Salath Diessenhofen von Nordwesten im Mittelgrund Kloster Sankt Katharinental Diessenhofen Aquatinta koloriert Swiss National Library CHNBCollection Gugelmann