The extension of the historic town hall in Holzwickede offered the opportunity to round off the market square in terms of urban development and to give the town hall itself a new unity. The listed town hall, built in 1914, was retained as a solitary and recognizable structure. At the same time, an angular structure was added to it to create a new urban solitaire in which the existing building is a natural part of the larger whole. The new town hall develops around a central hall with square skylights. This is the foyer of the citizens' hall, contact point for the citizens' service, central communication point in the town hall and, last but not least, a museum hall in which the historic building itself is exhibited. The new part of the building fits together with it to form a functional and typological whole. The dead-end corridors of the historic town hall have been transformed into a circular circulation system that combines simple orientation with short distances.