The Deutsches Institut für tropische und subtropische Landwirtschaft (German Institute for Tropical and Subtropical Agriculture), as the legal successor to the Colonial School, still has the preserved files of the former German Colonial School in Witzenhausen (DKS), a small part of which is in the Marburg State Archives. At the DKS, farmers and planters were trained mainly for the German colonies in the period from 1899 to 1943 (i.e. far beyond the loss of the German colonies). The emphasis was on practical and theoretical training in agriculture, with a very broad curriculum ranging from colonial politics and ethnology to mechanical engineering and economic geography to language teaching. Over 3000 DKS personnel files of directors, employees, lecturers and pupils. In addition to registration and everyday school life such as payments, evaluations of individual achievements, etc., the student files sometimes also contain correspondence with the persons after completion of their training with descriptions of the farm and agriculture over years and sometimes decades, wherever the person worked. The employee and lecturer files usually contain considerably less, even CVs are rare. The complete personal files are recorded on index cards and can be searched (analogue). In addition, various material such as property administration, library books, records of the Court of Honour of the DKS. Extensive photo collection.