The Civitas Fortissima Museum is small but important for understanding Balassagyarmat. Its focus is the town's local history, especially the events of January 1919, when Balassagyarmat resisted occupation in the confused months after the First World War.
You do not need to share every conclusion of the town's patriotic memory to find the museum useful. Border towns often carry history in a sharper way than capitals do, and this one explains why the phrase Civitas Fortissima appears so often around Balassagyarmat.