Do they teach nothing of European history in America? Magna Carta? Basically the inspiration behind your constitution?
1215, still a few parts left as enforceable law today. If you think US institutions are old, try European ones. We're still supposed to practice longbow on Sundays.
America is middle aged, at best. You haven't even changed regime yet. Only every been a republic. Never changed religion.
How cute. Poor old Spain has been back and forth with absolute monarchy, constitutional monarchy, republics and even a fascist dictatorship thrown in the mix.