Where did National Treasury go?

It seems to have been completely replaced by East India company. But I think it should be reintroduced as a national wonder available for building after you have a bank in every city, perhaps rename it to Central Bank or something more appropriate. Also, is it just me or has the Zoo entirely replaced the theatre? Is that because of the cultural connotations of a theatre, and they didn't want it to simply provide happiness any more so they cut it out?

Theatre sounds like it would have been a great work storage place, and they already had amphitheatre

I have noticed that too, and thought they would appear later as a Bank National Wonder and a culture building. But they didn't. Maybe something is planned for them and they will reappear in a future patch? Atleast the theater, though, because it's replacement seems somehow out of place.