Hi Lars,
Thank you for this report, it joggled my fond memories of good times when I was young
There are many more things related to astronomy happening in that country, especially in Istra peninsula.. to name just a couple of them:
Astronomical Observatory Pula
It is also a home of GMN,
Global Meteor Network.
Visnjan Observatory (famous for asteroids hunt)
During my high school days (late '60es of the last century), I was very active on
Zagreb's Astronomical Observatory.. then life happened and I ended up here in Oz :-)