I’m a little unsure what to think of the Mimara Museum in Zagreb, which I spent a couple of hours meandering around. It’s a well designed conversion of a former gymnasium building and there’s an extensive area for the exhibits. Unfortunately, there are persistent allegations against the museum that a chunk of their exhibits are fakes and forgeries.
The museum doesn’t seem to be doing much to defend itself against these persistent allegations, so goodness knows what the truth actually is. There’s an interesting article about the museum at https://www.lootedart.com/MFEU4T15383.