Fonds
Part of Achern City Archive
contains among others:- letters to Jenny Roller, née Dubbers, by son Gottfried Roller from Tsingtau (1904, 1908)- letters to Maria (Mirz) Krauss, née Roller, by brother Gottfried Roller from Tsingtau (1900-1912)- diaries by Gottfried Roller (1898-1908, 1908, 1908 - 1915)- photographs of cities in China: Beijing, Tsingtau (51 photographs)