Since 1928 Unna holds a Museum of Town history which has been recently rearranged in 1982. The expertise comprises an analysis of the current state of the Museum and develops approaches for a new alignment. Various versions of realisation concerning the synergy of the contentual demand and the spatial respectively the architectural potential have been inspected in regard to the historical castle as well as to the “Bottle Cellar” of the ancient “Lindenbrauerei”. As to present further bases of decision – making a spatial – and logic planning as well as diverse contentual basic approaches have been worked out.