Donau City / media owner & publisher: Vienna City Administration MA 21B - District Planning and Land Use ; responsible für the contents: MA 21B - Ines Mayr, Elfrieda Göpfrich-MillnerDonau City / media owner & publisher: Vienna City Administration MA 21B - District Planning and Land Use ; responsible für the contents: MA 21B - Ines Mayr, Elfrieda Göpfrich-Millner