: The colossal Roman "
Horse Tamers" or
Dioscuri are in the foreground, but the
obelisk from the Mausoleum of Augustus (erected 1781 – 1786) has not yet been set up between them. (1790–1857): His view, from the roof of the palazzo near the
Trevi Fountain that now houses the
Accademia di San Luca, substituted an imaginary foreground garden for the repetitious roofscape. The Quirinal Hill is today identified with the
Quirinal Palace, the official residence of the
President of the Italian Republic in Rome, and one of the symbols of the State. Before the abolition of the Italian monarchy in 1946, it was the residence of the king of Italy, and before 1871 it was, as originally, a residence of the Pope. The healthy cool air of the Quirinal Hill attracted aristocrats and papal families that built villas where the
gardens of Sallust had been in antiquity. A visit to the villa of Cardinal
Luigi d'Este in 1573 convinced
Pope Gregory XIII to start the building of a summer residence the following year, in an area considered healthier than the
Vatican Hill or
Lateran: His architects were
Flaminio Ponzio and
Ottaviano Nonni, called Mascherino; under
Pope Sixtus V, works were continued by
Domenico Fontana (the main facade on the Piazza) and
Carlo Maderno, and by
Gian Lorenzo Bernini for
Pope Clement XII. Gardens were conceived by Maderno. In the 18th century,
Ferdinando Fuga built the long wing called the
Manica Lunga, which stretched 360 meters along via del Quirinale. In front lies the sloping Piazza del Quirinale where the pair of gigantic Roman marble "Horse Tamers" representing
Castor and Pollux, found in the Baths of Constantine, were re-erected in 1588. In a view etched by
Giovanni Battista Piranesi, the vast open space is unpaved. The Quirinal Palace was the residence of the popes until 1870, though
Napoleon deported both
Pius VI and
Pius VII to France, and declared the Quirinal an imperial palace. When Rome was united to the
Kingdom of Italy, the Quirinal became the residence of the kings until 1946. Today, the palace hosts the offices and the apartments of the Head of State and, in its long side along
via XX Settembre (the so-called
Manica Lunga), the apartments that were furnished for each visit of foreign monarchs or dignitaries. Several collections are in this Palazzo, including
tapestries, paintings,
statues, old
carriages (
carrozze), watches, furniture, and
porcelain. In Piranesi's view, the palazzo on the right is the
Palazzo della Sacra Consulta, originally a villa built upon the ruins of the Baths of Constantine, which was adapted by Sixtus V as a civil and criminal court. The present façade was built in 1732–1734 by the architect Ferdinando Fuga on the orders of
Pope Clement XII Corsini, whose coat-of-arms, trumpeted by two
Fames, still surmounts the roofline balustrade, as in Piranesi's view. It formerly housed Mussolini's ministry of colonial affairs. == Other monuments ==