I can’t figure out why this isn’t included in neither the official CIV VI OST or the 25th anniversary album CIV VI DLC, but it isn’t.
It’s Christopher Tin’s official cover of “Volare, oh oh, cantare, oh oh oh oh” with lyrics by Leonardo da Vinci.
Some more Tin:The Drop That Contained the Sea (contains a link to Calling All Dawns as well). Just listen to this music and tell me it doesn’t make you feel happy to be alive)
EDIT: Oh crap, we’ve got a burrower here. I’ve played close to 7 hours of CIV IV in 72 hours, but I’m quite sure that my total playtime of Sogno di Volare is not far behind.