The same goes, outstandingly, for the two other great developments of the Wagner years in Berlin: the Grosssiedlungen Onkel-Toms-Hütte at Zehlendorf in the south-west sector of the city, and Britz, in the south.Both were developed by Gehag, the great housing agency formed in 1924 through the merger of several building societies with trades union funds and the Berlin Social Housing Society, which was responsible for so much publicly subsidized housing in Berlin at that time and in the Federal Republic after World War Two: a living illustration of the kind of agency Howard wanted to build his garden city, but never got on the scale needes.(Ironically, its postwar successor was racked by scandal in the i98os. Both were and are pure garden suburbs, at the then periphery of the city, developed on extensions of the U-Bahn system.