Dorschner Kahl and Heine Mildner arrange multi-generational housing around communal garden Dorschner Kahl Architects and Heine Mildner Architects have collaborated on Andreasgärten, a multi-generational housing scheme in Erfurt that integrates assisted living for the elderly with the wider community. Situated next to the fortress town of Zitadelle Petersberg in the city of Erfurt, Germany, the