Palazzo Pallavicini-Rospigliosi

Baths of Constantine (Latin, Thermae Constantinianae) was a public bathing complex built on the Quirinal Hill in Rome by Constantine I, probably before 315.Ancient Constantinople and Arles also had complexes known as Baths of Constantine.

The Palazzo della Consulta (built 1732–1737) is a late Baroque palace in central Rome, Italy, that since 1955 houses the Constitutional Court of the Italian Republic. It sits across the Piazza del Quirinale from the official residence of the President of the Italian Republic, the Quirinal Palace.

The Constitutional Court of the Italian Republic (Italian: Corte costituzionale della Repubblica Italiana) is the highest court of Italy in matters of constitutional law. Sometimes, the name Consulta is used as a metonym for it, because its sessions are held in Palazzo della Consulta in Rome.

The Teatro Eliseo (literally "Eliseus Theater") is a theatre located in Rome, Italy. Initially named Arena Nazionale ("National Arena"), built of wood and dedicated to variety shows, over the years took on increasing importance, up to undergoing a makeover in 1938 that decreed its current appearance and name.

The Fontana dei Dioscuri is the fountain set opposite the Palazzo del Quirinale, the official residence of the President of the Italian Republic in the Piazza del Quirinale. The original fountain, which no longer exists, commissioned by Pope Sixtus V in 1588, had the Dioscuri, Castor and Pollux statues, from Constantine I of Rome's Baths, moved to the piazza, from the site, thought to have been nearby, flanking it. In the late 1780s by Antinori, was commissioned by Pope Pius VI, to make a better layout for the piazza and had the fountain and the Dioscuri moved, and included the large Obelisk which had been moved from the Campus Martius in the design. Some time between, that original fountain was lost, and, in 1818 a new one, which can be seen today, was commissioned by Pope Pius VII and was designed by Raffaele Stern using an ancient granite Roman shell that had been found in the 16th century supported on top of a large basin. It was sited in front of the two statues with the obelisk between them. In 1810, the Rome-based sculptor Paolo Triscornia sent the reduced copies of the Dioscuri to Saint Petersburg for his compatriot Giacomo Quarenghi. They were put up in front of the Saint Petersburg Manege six years later.

Palazzo Koch is a Renaissance Revival palace on Via Nazionale in Rome, Italy and the current head office of the nation's central bank, the Banca d'Italia. It is named after its designer, the architect Gaetano Koch, and was built from 1888 to 1892.

San Silvestro al Quirinale (or St. Sylvester on Quirinal Hill) is a historic church in central Rome, Italy. It is located near Via XXIV Maggio corner with Via Mazzarino, a few blocks south of the Piazza del Quirinale.

The Quirinal Palace (Italian: Palazzo del Quirinale [paˈlattso del kwiriˈnaːle]) is a historic building in Rome, Italy, one of the three current official residences of the President of the Italian Republic, together with Villa Rosebery in Naples and the Tenuta di Castelporziano, an estate on the outskirts of Rome, some 25 km from the centre of the city. It is located on the Quirinal Hill, the highest of the seven hills of Rome in an area colloquially called Monte Cavallo. It has served as the residence for thirty Popes, four Kings of Italy and twelve Presidents of the Italian Republic. The Quirinal Palace was selected by Napoleon to be his residence par excellence as Emperor. However, he never stayed there because of the French defeat in 1814 and the subsequent European Restoration.The palace extends for an area of 110,500 square metres and is the tenth-largest palace in the world in terms of area, some twenty times the area of the White House.

The Papal States ( PAY-pəl; Italian: Stato Pontificio), officially the State of the Church (Italian: Stato della Chiesa, Italian pronunciation: [ˈstaːto della ˈkjɛːza, ˈkjeː-]; Latin: Status Ecclesiasticus; also Dicio Pontificia), were a series of territories in the Italian Peninsula under the direct sovereign rule of the pope from 756 until 1870. They were among the major states of Italy from the 8th century until the unification of Italy, between 1859 and 1870. The state had its origins in the rise of Christianity throughout Italy, and with it the rising influence of the Christian Church. By the mid-8th century, with the decline of the Byzantine Empire in Italy, the Papacy became effectively sovereign. Several Christian rulers – including the Frankish kings Charlemagne and Pepin the Short – further donated lands to be governed by the Church. During the Renaissance, the papal territory expanded greatly and the pope became one of Italy's most important secular rulers as well as the head of the Church. At their zenith, the Papal States covered most of the modern Italian regions of Lazio (which includes Rome), Marche, Umbria and Romagna, and portions of Emilia. These holdings were considered to be a manifestation of the temporal power of the pope, as opposed to his ecclesiastical primacy. However, by 1861, much of the Papal States' territory had been conquered by the Kingdom of Italy. Only Lazio, including Rome, remained under the pope's temporal control. In 1870, the pope lost Lazio and Rome and had no physical territory at all, except the Basilica of St Peter and the papal residence and related buildings around the Vatican quarter of Rome, which the new Italian state did not occupy militarily, despite annexation of Lazio. In 1929 the Italian Fascist leader Benito Mussolini, the head of the Italian government, ended the "Prisoner in the Vatican" problem involving a unified Italy and the Holy See by negotiating the Lateran Treaty, signed by the two parties. This treaty recognized the sovereignty of the Holy See over a newly created international territorial entity, a city state within Rome limited to a token territory which became the Vatican City.

The Bank of Italy (Italian: Banca d'Italia), (pronounced [ˈbaŋka diˈtaːlja]), is the central bank of Italy and part of the European System of Central Banks. It is located in Palazzo Koch, via Nazionale, Rome. The bank's current governor is Ignazio Visco, who took the office on 1 November 2011.

Palazzo Mengarini is a 19th-century palazzo in via XXIV maggio in Rome. The palace is named after a 19th-century Senator during the Kingdom of Italy, Guglielmo Mengarini. The Senator commissioned the palace design from the architect Gaetano Koch. Mengarini's wife, the German chemist Margarete Traube, animated a lively salon at this palace, hosting Theodor Mommsen, Emanuel Löwy, Pietro Blaserna, Adolf Furtwängler, as well as her brother Ludwig Traube. It subsequently became property of Senator Luigi Albertini, director of Corriere della Sera, and after 1941, of his daughter Elena née Carandini.

The Temple of Serapis on the Quirinal Hill in Rome was an sanctuary in Ancient Rome dedicated to the god Serapis and the goddess Isis.The temple was founded on an unknown date but known to have existed during the reign of Caracalla. It was known as the most monumental temple of the Quirinal Hill. In the 4th century, the temple was closed during the persecution of pagans in the late Roman Empire, after which it was torn down and used as building material.The gardens of the Palazzo Colonna contain what are believed to be the ruins of the Temple of Serapis.