The Nordico Museum of the City of Linz is the city's civic museum, housed in a former monastery near the old centre. Its exhibitions focus on Linz, Upper Austrian history, and regional culture, with temporary shows that often widen the lens to ecology, urban life, and local identity.
It is a good stop if you want context after seeing the cathedral, Hauptplatz, and the Danube museums. The scale is manageable, and the building gives the visit a quieter tone than Linz's bigger contemporary museums.