1. The Dome
It is the tallest dome in the world, the dome of St. Peter’s rises to a total height of 136.57 metres (448.1 ft) from the floor of the basilica to the top of the external cross.
2. The square
At the centre of the square is an ancient Egyptian obelisk, erected at the current site in 1586. Gian Lorenzo Bernini designed the square almost 100 years later, including the massive Tuscan colonnades, four columns deep, which embrace visitors in “the maternal arms of Mother Church”. A granite fountain constructed by Bernini in 1675 matches another fountain designed by Carlo Maderno in 1613.
3. Apostolic Palace
The building contains the Papal Apartments, various offices of the Catholic Church and the Holy See, private and public chapels, Vatican Museums, and the Vatican Library, including the Sistine Chapel, Raphael Rooms, and Borgia Apartment.
4. Via della Conciliazione
Roughly 500 metres in length, it connects Saint Peter’s Square to the Castel Sant’Angelo on the western bank of the Tiber River.
5. Borgo Santo Spirito, Santo Spirito in Sassia
Church of the Holy Spirit in the Saxon District is a 12th-century titular church in Borgo Santo Spirito, a street which got its name from the church, placed in the southern part of Rione Borgo.
6. Passetto di Borgo
It’s an elevated passage that links the Vatican City with the Castel Sant’Angelo. It is an approximately 800 metres long corridor, located in the rione of Borgo.
7. Castel Sant’Angelo
The Mausoleum of Hadrian, usually known as Castel Sant’Angelo, is a towering cylindrical building in Parco Adriano. It was initially commissioned by the Roman Emperor Hadrian as a mausoleum for himself and his family.
8. Ponte Elio or Ponte Sant’Angelo
Completed in 134 AD by Roman Emperor Hadrian, to span the Tiber from the city center to his newly constructed mausoleum, now the towering Castel Sant’Angelo. The bridge is faced with travertine marble and spans the Tiber with five arches, three of which are Roman; it was approached by means of ramp from the river.
9. The Tiber
It’s the third-longest river in Italy, rising in the Apennine Mountains in Emilia-Romagna and flowing 406 kilometres through Tuscany, Umbria and Lazio, where it is joined by the river Aniene, to the Tyrrhenian Sea, between Ostia and Fiumicino.
10. The Palace of Justice
It’s the seat of the Supreme Court of Cassation and the Judicial Public Library, is located in the Prati district of Rome. It fronts onto the Piazza dei Tribunali, the Via Triboniano, the Piazza Cavour, and the Via Ulpiano. The huge building is popularly called in Italian the Palazzaccio (the bad Palace).
11. The Quirinal Palace
It’s one of the three current official residences of the President of the Italian Republic. It is located on the Quirinal Hill, the highest of the seven hills of Rome. It has housed thirty Popes, four Kings of Italy and twelve presidents of the Italian Republic.
12. The Janiculum
It’s the second-tallest hill (the tallest being Monte Mario) in the contemporary city of Rome, but does not figure among the proverbial Seven Hills of Rome, being west of the Tiber and outside the boundaries of the ancient city.