And why not bury the working areas of such places underground with great atriums and other sunlight enhancing technological treatments. Better heating, cooling, sound etc. as well as safer.
Public nonworking areas could be above ground in grand forms.
I understand that after all our super blasts at the palace over one of Saddam's German engineered bunkers, the bunker itself was totally unscathed.
10-20' of concrete roof; on springs etc.
Seems to me, even the President's residence could be constructed such that most of it was below ground.
And perhaps even the above ground parts could be designed to sink under a blast door within 60-120 seconds or some such.
Idle musings. No such will be done. Then it won't be necessary. Perhaps until the enemy is loosed for testing the folks at the end of the 1000 years of peace.
Yes, we could build much of the city underground. Building such a city would create new technologies for cities that would have nations around the world seeking our solutions and further enhancing our economy.
Though I likely won't see it, I'd believe someday something along these lines of thought will be done.