The National Museum of Finland in Helsinki is very good indeed. Sadly the medieval exhibition is still being built, to open in 2020. The prehistoric section is as good as any I've seen, and the 'interactive' bits are excellent - so often, 'interactive' just means 'glue an iPad to the glass.'
Bonus points for having a section in the 'Story of Finland' dedicated to heavy metal - with a soundtrack including (among others) Nightwish, Children of Bodom, and Stone.
@AspiringLuddite hell yes
Medievalists and Medieval-adjacent. Sort-of.