I think I need to rethink my use of Museums, Art Galleries, and Libraries.
I deleted my Museum because I needed the lot for something else and I had the Art Gallery as a cultural alternative.
I read the description for the Museum community lot and it reads like how I am using my Art Gallery. I happen to be playing my Snobby, Art Loving sim at the time, whose family has also amassed a lot Selvadoradian artifacts, but she has no archeology skills herself.
So I added some Selvadorada objects to the Art Galley.

She is also a style influencer, so she can look at art and get inspiration for being a fashion stylist.

It seems her best bet for building that archeology skill for now is a book.
I do like this as an alternative setting to the library. She fits in better here.

I also put in some research computers to make this lot more flexible.

My art gallery is set up with a room for Get Together Art Clubs.
My sims aren't ready for it yet, as one of them is still a child. But they will form one when he is a young adult.
I will furnish it at that time.

The Sims 4 worlds are too small to have the same community lots in each world.
So San Myshuno will have the only art Galley. Windenburgh has the Library that used to be in Brightchester. My College Prep/Boarding school has taken the lot where the library used to be. I'll think about locating a Museum in one of the other worlds.