@Michaal99 I checked and I did not remove the apartment tag from the building. I just added a new point, which has the more specific type of Museum. But it might be that the online editor of OSM is not showing me something that you are seeing, so feel free to fix the issue.

@NorthCrab_upload Thanks for the links. I actually was unsure about the conventions here, so thank you for educating me on it!

@Michaall99 Sorry, did not mean to do that. I just wanted to add the museum to the apartment building