Egyptian monuments surviving city capture

[dr_s]

I'm playing a game as Hannibal, and I'm capturing Egyptian cities. The monuments are surviving in captured cities (see attached screenshot). I didn't think that was possible, because they are culture buildings, but maybe it's because they're the Egyptian UB? Or is there some other explanation? (Since Hannibal is Charismatic, I'm not complaining, just curious.)

 

[ParadigmShifter]

Obelisks are the Egyptian UU

I think you have built stonehenge... EDIT: Or captured it.

 

[dr_s]

I think you have built stonehenge... EDIT: Or captured it.

Doh! You're right, of course.