The Trevi Fountain of Rome, realized under the Pontificate of Clemente XII around 1735 after Christ along the "Palazzo Poli", is the work of the architect Nicoḷ Salvi and it is still nowadays alimented by the water supply system Virgin projected in 19 before Christ by the consul Agrippa.

Concerning the etymology of the monument, there are at least two hypothesis that both have their origins in the antique story of Rome: some people sustain that the name of the Fountain of Trevi comes from "Trivia", the girl who would have indicated to the General Marco Agrippa, coming back to Rome after the victorious battle of Anzio against Antonio, the source which then will serve as the spring, while others retain probable the alliteration of the Latin toponym "regio trivii", through which presumably was indicated either the intersection of three roads close to which surging the Roman fountain or the characteristic itself of the source to have three distinct jets of water.

The first work of arrangement and restoration of the water supply system is realized by Pope Nicoḷ V Parentucelli and Leon Battista Alberti and Bernardo Rossellino are charged of the projects; afterwards Urbano VIII Barberini charges Bernini to project a new source, who will start by destroying the pre-existing Renaissance elevation.

The works, however, stop to the realization of a basement at exedra, with a front tank in which join three mouths of water and only in 1730 after Christ, 90 years later, Pope Clemente XII will banish a competition for the definitive realization of the fountain of Trevi won by Nicola Salvi.

The attic of the Fountain of Trevi is decorated by four personified statues that represent, starting from left, "the Abundance of fruits", of Agostino Corsini, "the Fertility of the fields" of Bernardino Ludovisi, "the Gifts of Autumn" of Francesco Queirolo and "the Amenity of the grasslands" of Bartolomeo Pincellotti and at the top we find a large writing wanted by Pope Clemente XII, which stemma, at the top, is edged by two Fame of Paolo Benaglia.

In the biggest niche at the centre, edged by Corinthian columns, the big statue of the Ocean, projected by Giovan Battista Maini but sculptured by Pietro Bracci, leads a stagecoach having the form of a shell guided by a triton and dragged by two winged sea horses, one quick-tempered and the other placid while on the sides are located the personifications of the Healthiness and the Abundance by Filippo Della Valle.

Giuseppe Pannini, succeeding to Salvi to the direction of the works as the new architect of the Virgin Water, completed the project of Salvi with the creation of regular tanks with shiny sides in marble in the central part of the reef. The small piazza of Trevi, that welcomes the most famous fountain of Rome, is probably the most crowded place, full of visitors, which, as the tradition wants, throw a coin in the tank hoping that this gesture will guarantee them to come back to Rome again.

The Quirinale ( a hill that derives its name from the Quirino's Temple that rose here, near to the door in the Servian Walls ) represents both one of the Seven Hills where rome was founded, and the name of the official residence of the President of the Republic.

Inhabited from the Iron Age ( and proof of that are many graves found near to Porta Collina and Porta Sanqualis, as well as many ex voto dating back to the VIIth century B.C. Found near to Santa Maria della Vittoria and the Dueno's Pot, with one of the most ancient inscription in Latin, that can be dated to VIIth or Vith century B.C.) its land is a continual source of archaeological findings.

To realize it, only consider mosaics dating back to IInd century B.C.found under the Church of Santa Prudenziana, but also the great amount of temples that bordered the way that runs along the edge between Quirinale and Viminale Hill ( there were in fact temples of Pudicitia Plebeia, of Fortuna Euelpis, of Spes and of Febris; near to Porta Collina there were other three temples dedicated to Fortuna, the one of Venere Erycina and the one of Hercules ).

Many distinguished personalities of the Ancient Rome contributed to develop the Quirinale Hill became, together with Viminale, the VIth Augusto's region. In fact Tiberio built, outside city walls, the Castra Praetoria, Caracalla built the Temple of Serapide, Costantino constructed instead the last Rome Thermal Baths ( that are lost ); border on Horti Sallustiani, Emperor's Residence, on Quirinale Hill staied also many important persons such as Tito Pomponio Attico, Marziale and Vespasiano.

The quarter developed around this main roads: the Vicus Patricius, the Vicus Longus ( the present Via Nazionale ) and the Alta Semita.

Monuments to be visited on the hill, maybe staying in one of the Quirinale hotels, are a of great importance and also very numerous:

• Sant'Andrea al Quirinale Church, designed by Gian Lorenzo Bernini;
• Le Quattro Fontane San Carlo alle Quattro Fontane Church, by Borromini;
• Palazzo del Drago;
• Palazzo Volpi di Misurata, in front of San Carlino;
• Palazzo Baracchini (now Department of Defence seat ).
• San Silvestro al Quirinale Church;
• Villa Colonna (XVIIth century), in front of Palazzo Rospigliosi, that contain remains of the Temple of Serapide by Caracalla;
• Palazzo della Consulta, that nowadays hosts the Constitutional Court;

In addition those mentioned before, the hill offers many ancient remains, amongst which: Horrea Galbana, the Sepolcro dei Sempronii, the Ara of Nero's Fire, the Magazzini di Lucio Nevio Clemente, the Mitreo Barberini, the Capitolium Vetus, the Santuario di Diana Plancianam, the Santuario di Semo Sancus Dius Fidius, the Tempio della gens Flavia, the Tempio di Flora, the Tempio della Salus.

The Quirinale Palace, President of the Republic residence, was built in the end of the XVIth century by Pope Gregorio XIII. After many years when the palace was enlarged ( many important architects such as Mascarino, Maderno, Borromini, Fontana, Bernini etc... worked there ) and its construction ended only in 1732.

Until 1870 the Quirinale was the summer residence of Popes, that preferred it to the Vatican one for its good aria, considered healthier; after that Rome was conquered by the Reign of Italy, until 1946 many kings staied in the Quirinale Palace.

The Quirinale is also a large receptacle of art works: inside you'll find tapestries, paintings, carriages, statues, porcelains, furniture, clocks and chandeliers of excellent quality and value, that show off themselves in the common-room and in the annexes renoved to host other Chiefs of State coming from abroad.

In relation to the Quirinale, also its gardens are very famous ( they nearly constitute a privileged "island" in Rome ), the Scuderie, destined as important display area (about 1500 squared metres), inaugurated by the President Ciampi and allowed to the Rome Municipality , the Caserma dei Corazzieri and the Archivio Storico.