Berlin im Aufbau (English: Berlin under Construction) is an East German documentary film directed by Kurt Maetzig, one of East Germany's most respected film-makers, between 1945 and 1946. It was a prominent 22 minute documentary, released in 1946 and produced by the DEFA film company. Maetzig was assisted in the assembly of the film by Marion Keller, who had also scripted and organized several other propaganda films of the late 1940s.