Hazrat Mahdi (as) will spiritually conquer Rome, there will be a great earthquake in Vatican

"...Hazrat Mahdi (as) and his followers will...capture Rome with tasbih (praising of Allah) and takbir (declaration of the greatness of Allah)...The walls of that city [THE VATICAN] will collapse... [by an earthquake]..." (Al-Barzanji, Al-Isha'ah li-ashrat al-sa'ah, p. 204)

The walls of the Vatican were damaged as a result of an earthquake in Italy. Many buildings in Rome collapsed.

http://us2.harunyahya.com/Detail/T/EDCRFV/productId/13806/THE_VATICAN_IS_BEING_ROCKED_BY_EARTHQUAKES!_1