1862-1946 1874-1929 1904-1974 1906-1996 1939-1945 20thcentury art artcollections authors biography collectorsandcollecting descriptionandtravel europe exhibitions exhibitionsherzogaugustbibliothek exhibitionskästner gerhart german germanliterature germans germany greece hauptmann herzogaugustbibliothek history historyandcriticism hugovon illustrationofbooks inliterature kästner koeppen kästner manuscripts manuscriptskästner modern motives privatecollections pt2621 themes travel travelhauptmann travelhofmannsthal travelkästner travelkoeppen travelwriting wolfenbüttel wolfgang worldwar