Back in 2010 Hayley visited Vatican City ahead of the Pope's visit to Britain.
It was a big moment for the millions of Catholics in the UK as it was the first time a Pope had visited in more than 25 years.
While many people were really excited about the Pope's visit, others disagreed with what he stands for and with some of the things he'd done.
Hayley flew to Italy to visit where the Pope lives and find out more about him.
What is Vatican City?
Vatican City is world's smallest country. It's located inside Rome, the capital city of Italy.
It's sometimes just called the Vatican, or the Holy See.
From the Vatican the Pope directs the government of the Catholic church.
The official language there is Latin although Italian is widely spoken as well.