On a related note, I visited the St Louis Art Museum which is on the site of the 1904 World's Fair. Then it contained many ornate buildings made of plaster: https://encyclopediavirginia.org/wp-content/uploads/2020/11/...

The art museum is in a remodeled building that sits on the top of the same hill overlooking the pond. What it looks like now: https://nohomejustroam.com/wp-content/uploads/2023/05/St-Lou...

Those world's fairs were something else.