On the occasion of the »Construction Days« in the autumn of 1969, the Hamburg Building Authority commissioned five HFBK film students to film one Hamburg commercial each. Christian Bau opted for a critical portrait of Osdorfer Born, Hamburg's first large-scale, prefabricated housing estate, which had been built from 1967 by Neue Heimat, SAGA and other housing companies on the western edge of the city. The images, shot on 16mm, were accompanied by interview passages and a text taken from SAGA's housing construction program. The client was less than enthusiastic, the film disappeared into a closet for decades and can now be shown for the first time in the cinema.