St. Peter's Basilica
Why is it significant?
Vatican City is considered the world's headquarters for Catholicism. Therefore, St. Peter's Basilica represents the Christian religion, in general. This is due to the fact that Simon Peter (St. Peter), one of the twelve apostles and the leader of the Christian Church when the religion was still new. He was also the first pope, and this basilica is built over the place where he was crucified and buried.