We also went to the Vatican, which is where the Pope lives. The Vatican is surrounded by Rome but is actually its own country. They even have their own postal system and our guide told us that we should mail our postcards from there because they'd get to the U.S. much quicker then with the regular Italian mail.
The Vatican has one of the most famous churches in the world, St. Peter's Basilica, which was HUGE. Another really famous part of the Vatican is the Sistine Chapel, which is a much smaller church. The Sistine Chapel is so famous because over 500 years ago, the Popes wanted all the walls and even the ceiling painted by the best painters in Italy. The entire ceiling was painted by Michelangelo, showing stories from the Old Testament Bible. There were also paintings along both walls. In the front of the chapel was a huge painting called "The Last Judgment." Michelangelo also painted that, which I thought was really amazing. He's one of the best artists ever.
And last, but not least, the best thing you can get in Italy is THE PIZZA!!!!! The pizza was amazing in ... the best in the world and my absolute favorite. I should know, I've tried pizza in almost everyone country we've been to so far.