What do you really know about Vatican City?

The Vatican, comprising the Apostolic Palace, St. Peter's Basilica, and various other buildings, serves as the headquarters of the Catholic Church. It has done so for nearly two millennium ever since the first Pope, St. Peter, made it his home.

Thousands of Catholics flock to the Vatican and its iconic basilica each year. But what do you really know about this great basilica and the city that houses it?

Here, Father Jeffrey Kirby takes you on a whirlwind tour of this little country (yes, Vatican City is its...