How to model Eiffel Tower?

How would you model Eiffel Tower? I mean, 7300 tonnes of the metal structure, quite a lot vertices. Yet still it has a clear profile with many repeating patterns. Is this kind model of any use of modifiers to simplify the task?

http://upload.wikimedia.org/wikipedia/commons/thumb/d/da/MG_8998.jpg/180px-MG_8998.jpg (Picture from Wikipedia)

I think the best way to tackle it would be with a fair amount of array modifiers for the repeating geometry, and curve modifiers to get the right shape.
I don’t think there’s any real secret to modeling it, it appears to be pretty simple patterns, just repeating. You’re right though, to model a truly detailed Eiffel Tower would use a hell of a lot of verts. That, and a hell of a lot of time.