The Quirinal Hill is one of the Seven Hills of Rome, at the north-east of the city center. It is the location of the official residence of the Italian head of state, who resides in the Quirinal Palace; by metonymy "the Quirinal" has come to stand for the Italian president. The Quirinal Palace has an extension of 1.2 million square feet.
The Caelian Hill is one of the famous seven hills of Rome.
The properties of the Holy See are regulated by the 1929 Lateran Treaty signed with the Kingdom of Italy. Although part of Italian territory, some of them enjoy extraterritoriality similar to those of foreign embassies.
Trevi is the 2nd rione of Rome, Italy, identified by the initials R. II, located in Municipio I. The origin of its name is not clear, but the most accepted theory is that it comes from the Latin trivium, because there were three streets all leading to the current Piazza dei Crociferi, a square next to the modern Trevi square. Its coat of arms is made of three swords on a red background.
Regola is the 7th rione of Rome, Italy, identified by the initials R. VII, and belongs to the Municipio I. The name comes from Arenula, which was the name of the soft sand that the river Tiber left after the floods, and that built strands on the left bank.
Pigna is the 9th rione of Rome, Italy, identified by the initials R. IX, and belongs to the Municipio I. The name means "pine cone" in Italian, and the symbol of the rione is the colossal bronze pine cone standing in the middle of the homonymous fountain. The fountain, which was initially located in the Baths of Agrippa, now decorates a vast niche in the wall of the Vatican facing the Cortile della Pigna, located in Vatican City.
Campitelli is the 10th rione of Rome, Italy, identified by the initials R. X, and is located in the Municipio I.
Ripa is the 12th rione of Rome, Italy, identified by the initials R. XII, and it is located in the Municipio I.
Borgo is the 14th rione of Rome, Italy. It is identified by the initials R. XIV and is included within Municipio I.
Esquilino is the 15th rione, or administrative division, of Rome, Italy, identified by the initials R. XV, and is Located within the Municipio I. It is named after the Esquiline Hill, one of the Seven Hills of Rome.
Castro Pretorio is the 18th rione of Rome, Italy, identified by the initials R. XVIII, and it is located within the Municipio I. The rione takes its name by the ruins of the Castrum Praetorium, the barracks of the Praetorian Guard, included in the Aurelian Walls.
Celio is the 19th rione of Rome, Italy, identified by the initials R. XIX, and is located within the Municipio I.
Campo Marzio is the 4th rione of Rome, Italy, identified by the initials R. IV. It belongs to the Municipio I and covers a smaller section of the area of the ancient Campus Martius. The logo of this rione is a silver crescent on a blue background.
There are more than 900 churches in Rome, which makes it the city with the largest number of churches in the world. Almost all of these are Catholic.
Cavour is a station on Line B of the Rome Metro, opened on 10 February 1955. It is located on via Cavour, in the Monti rione of Rome, midway between Santa Maria Maggiore and via dei Fori Imperiali.
Colosseo is a station on Line B of the Rome Metro. It was opened on 10 February 1955 and is located, as its name suggests, in the Monti rione on via del Colosseo near the Colosseum. The station is currently being expanded to be the new northern terminus of Metro's Line C.
During the Middle Ages, Rome was divided into a number of administrative regions, usually numbering between twelve and fourteen, which changed over time.
Piazza d'Aracoeli is a square of Rome (Italy), placed at the base of the Capitoline Hill, in the Rione X Campitelli.
Giovanni Battista Mercati (1591–1645) was an Italian painter and engraver, active in a Baroque style.
The following outline is provided as an overview of and topical guide to Rome:
Italy 
