Keywords: Köln - Zoologischer Garten.jpg en Postcard dated 18 6 1918 Title Cologne at Rhine river - Zoological garden de Postkarte datiert 18 6 1918 Titel Köln a Rh - Zoologischer Garten private collection of Wolfgang Sauber Xenophon anonymous 1918 PD-1923 anonymous-EU Cologne in the 1910s Cologne Zoo Postcards of Cologne |