Salaspils concentration camp was established at the end of 1941 at a point 18 km southeast of Riga (Latvia). The Nazi bureaucracy drew distinctions between different types of camps. Officially, Salaspils was a Police Prison and Work Education Camp (Polizeigegfängnis und Arbeitserziehungslager). It was also known as camp Kurtenhof after the German name for the city of Salaspils. Planning for the development of the camp and its prisoner structure changed several times. In 1943, Heinrich Himmler briefly considered converting the camp into an official concentration camp (Konzentrationslager), which would have formally subordinated the camp to the National Security Main Office (Reichssicherheitshauptamt or RSHA), but nothing came of this.