Vatican: St. Peter's Basilica, Rome, Italy "I will tell you, you are Peter, I will build my church on this stone, the gates of hell will not win." Matthew 16: 18 St. Peter's Basilica is a church in the world. The importance of the Cathedral comes from Matthew's Gospel of the Bible. The apostle Peter was buried beneath the altar of St. Peter's Cathedral, and Jesus showed instructions given to Peter.
Free attractions: Rome is a walkable museum with photos of every street, but the main attractions are the Colosseum, Laterano's San Giovanni Cathedral, Roman Forum, Circus Maximus, Vatican Museum, St. Peter's Basilica, St. Peter's Square, Sant'Angelo Castle, Pantheon, Piazza Navona, Spanish Steps, Campo dei Fiori, Trevi Fountain etc. I only stayed 2 nights in Athens, but in a day I was able to see the main attractions. You can definitely spend more time here, in fact I recommend you do this, do not rush to the trip, do not learn about the local people, and try more food Please try. If the budget is limited, there is over 2 nights in Greek capital.
Rome is home to the Vatican City and St. Peter's Basilica, but the Cathedral of Rome is the Cathedral of St. John Lateran located in the southeast of the city center. There are about 900 churches in Rome, as well as the cathedral, the Cathedral of Santa Maria Maggiore, the St Paul's Cathedral outside the wall, the Cathedral of Saint-Clement and the San Carlo Alle Quattro Fontane Church, Jesus church and so on. Under the city there is an ancient Roman catacomb. There are many important religious educational institutions in Rome, such as Papal Rutland University, Paternal Bible University, Pope Gregory University, Pope Oriental School and so on.