The Reichspostministerium (RPM) in Berlin was the Ministry of Posts and Telecommunications of the German Weimar Republic from 1919 until 1933 as well as of Nazi Germany from 1933 to 1945. Especially during the Nazi rule, it had authority over research and development departments in the areas of television engineering, high-frequency technology, cable (wide-band) transmission, metrology, and acoustics (microphone technology).