Let's push a big deeper into Central Europe after Austria and Poland. Hungary is a country with the same population as Belgium, bigger if you include Hungarians living in surrounding countries, so I expect to find enough contributions to the world to start a poll. However it is probably one of the EU countries I know the least about. Your help will be appreciated.
Here is what I found :
- classical music (Liszt, Bartok...)
- the ballpoint pen
- the Rubik's Cube (+ similar puzzles)