The Kállay Collection is a small but distinctive museum built around the legacy of the Kállay family, one of the historic noble families of the region. Its holdings include family papers, photographs, books, personal objects, and a notable group of medals and decorations, including material connected with Miklós Kállay, Hungary's prime minister during the Second World War.
It is not a broad national museum, but it gives Nyíregyháza a more specific historical stop than a casual walk around the centre. Go if you are interested in Hungarian county history, aristocratic families, or the way private collections become civic memory. The museum is compact enough to pair with the city's main square and other central sights.