I'll bet the Pope spent at least some time here:
http://www.comune.castelgandolfo.rm....Imc=14&IdSec=2
http://en.wikipedia.org/wiki/Castel_gandolfo
This is the Pope's summer residence, in the Alban Hills, and also home of the Vatican Observatory, and its astronomy library. If you believe the
Da Vinci code, this is where a lot of the secret books are.