Interbau was a housing development, constructed as part of the 1957 International Building Exhibition in the Hansaviertel area of West Berlin. The overall plan was managed by Otto Bartning, and the urban design competition was won by Gerhard Jobst and Willy Kreuer, whose plans were later executed in a modified form. Working within constraints of size, layout and cost, forty-eight architects designed a huge range of accommodation, both low- and high-rise, with many permutations in plan.