The digital collection Bildbestand der Deutschen Kolonialgesellschaft (DKG) [Image collection of the German Colonial Society] has been created at the Universitätsbibliothek Frankfurt am Main. The DKG existed from 1887 to 1936. The 50,000 images in this collection have been made in several countries, mainly in Africa (Togo, Cameroun, Namibia, Burundi, Tanzania and Rwanda), China, Papua-Guinea (Irian Barat) and several islands in the Pacific Ocean (Marshall Islands, Carolines, Nauru, Mariana Islands and West-Samoa). You can search the images (Recherche im Bildarchiv) for creators, subjects, regions, persons, tribes and nations, and free text. You can turn on a search mode in English. The Erweiterte Suche allows you to create your own combinations of search fields.
On the website of the DKG image collection you can also read a digital version of the Deutsches Kolonial-Lexikon, Heinrich Schnee (ed.) (3 vol., Leipzig 1920). This reference work has many maps and illustrations. At the website of the UB Frankfurt am Main you can read background information about the DKG collection, and also download a PDF (125 MB) of a study about Namibia by Wilhelm R. Schmidt, Deutsch-Südwest-Afrika : Fotos aus der Kolonialzeit 1884 – 1918 (Frankfurt am Main 2001). Among the e-docs of this library you can browse also some 250 digitized books from the collection of the Kolonialbibliothek; a number of them was published before or during the First World War. The UB Frankfurt am Main hosts also ILISS Africa, the Internet Library Sub-Saharan Africa.