Surrounded by a 2-mile border within Italy, Vatican City is the smallest country in the world, with just over 100 acres of land. And yet, it is among the most powerful and influential countries on the entire planet. But as much as it is the location of the seat of the Papacy, it is also a hub of controversy.

Let’s unravel the mysteries of one of the most secretive city-states in the world.

From the Vatican and the Holocaust to the secret confession tribunal, here are 15 secrets the Vatican doesn’t want you to know!