Hi, Welcome to OpenStreetMap.

It's OSM practice not to map a feature twice. So if the museum is a business within this building it should be mapped/tagged as a node only, leaving the building mapped/tagged with only the building info. If the museum the whole building then the building is mapped/tagged as the business, there should not be a node mapped as well. I've amended the tags to reflect the former option. If this is incorrect please say and I'll amend further.

Regards Bernard.