An interesting case is the Pergamon museum in Berlin, which as an aside is an absolutely breathtaking museum to visit. Most of the big exhibits like the Ishtar gate were in place by the 1930s, where they subsequently experienced WW2. The market gate in particular was damaged by bombs and had to be restored after the war. That restoration failed due to improper conservation and more work had to be done in the 2000s.
As far as I'm aware, there's never been serious discussion of the safety of things in Berlin though. Considerations of safety really only go one way.
I will say that my ex was a fan of a particular Spanish artist, and she was very upset to discover only while standing in the Spanish wing of the Louvre that her favorite painting had been repatriated to Spain, and only some small examples of his work remained. Google was only an infant at the time, and learning about art history from a book has its limitations.
I couldn’t blame them for wanting a famous work back for their own museum, but it was a major bummer all the same. But Spain is not iron curtain era Berlin, or a tumultuous Middle East, so it’s hardly a fair comparison. It’s difficult to find a balance, but what we know of peak British Empire, from every emancipated colony, is that they just didn’t care.
People like to complain about how arrogant the US is and I just think of that old anti drug commercial, “I learned it from watching you, Dad.” Parents who do drugs have kids who do drugs.
As far as I'm aware, there's never been serious discussion of the safety of things in Berlin though. Considerations of safety really only go one way.