Architecture
This is the basilica named after St. Peter
What is St. Peter's Basilica?
The number of visitors per year (any number in the range is acceptable)
5-7 million
This is the official language of the Vatican
Latin
Lateran Pacts of 1929
The obelisk in the middle of St. Peter's Square was imported by this man.
Caligula
This is the number of people per acre (rounded answers acceptable).
9.2
This is the only one in the world that offers instructions in Latin
ATM
This man signed the Lateran Pacts from the side of Italy, not a Summerall Guard
Benito Mussolini