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Thomas Ender Aussicht vom Gamskarlkogl auf die Salzburger Gletscher bey HofGastein. Aquatint colored Institution sterreichische Nationalbibliothek place of discovery object history exhibition history credit line Widmung Seiner kaiserl Hoheit dem Durchlauchtigsten Herrn Erzherzog Johann von Oesterreich in tiefster Ehrfurcht gewidmet