If you're interested in the Knights of Malta have a look at https://en.wikipedia.org/wiki/Villa_del_Priorato_di_Malta https://en.wikipedia.org/wiki/Villa_del_Pr

If you're interested in the Knights of Malta have a look at https://en.wikipedia.org/wiki/Villa_del_Priorato_di_Malta https://en.wikipedia.org/wiki/Villa_del_Priorato_di_Malta which is a bit of extra-territorial Italy in Rome given to the Order. There's a cool optical illusion looking through its "Aventine Keyhole" towards St Peters.