The Pantheon is one of the best-preserved examples of Roman monumental architecture. It dates back to 27 BC., when Marcus Vipsanius Agrippa, son-in-law, friend, and collaborator of Augustus, had the first temple built in this area, which was dedicated to "all the gods". However, its current form is probably owed to Hadrian, who had its orientation reversed and had it enlarged with the addition of a portico in the period between 118 and 125 AD. I AM NOT SURE THIS IS ACCURATE! .In 1870 the Pantheon was turned into a memorial chapel for the kings of Italy; Vittorio Emanuele II, Umberto I, and Margherita di Savoia were buried there. It was also the burial site of numerous artists, including Raffaello Sanzio. The building consists of a cylindrical structure preceded by a portico with Corinthian columns that support the pediment. On the frieze of the entablature, the original inscription with the dedication to Agrippa is still visible. What is most surprising about the architecture of the Pantheon is its size: the height of the building is equal to the diameter of the dome, just over 43 meters, a feature that reflects the classical canons of Roman rational architecture.

The most famous fountain in Rome, the Trevi Fountain is a jewel of water and stone. The Trevi Fountain is the most famous fountain in Rome. Its water comes from the ancient Roman aqueduct called Acqua Vergine (Aqua Virgo), the only ancient aqueduct still use to this day. The construction of the Trevi Fountain is to be owed to Pope Clement XII, in 1732. The fountain underwent restoration works in the years 1989-1991. The last major restoration works took place in 2014 and were carried out thanks to the financial contribution of the Maison Fendi. On the right side of the fountain, there is a rectangular pool with two small nozzles: the fountain of lovers.

The Turtle Fountain, built between 1581 and 1588. The history of the fountain is linked to a romantic legend. It is said that Duke Mattei, a lover of gambling, one day lost his entire family fortune in one fell swoop. His future father-in-law refused, therefore, to give him his daughter in marriage. In response, the duke had this magnificent fountain built in a single night. The next day he invited his bride-to-be and her father to the palace to show them the work, telling them that he was able to make that magnificent work in a few hours. In memory of the episode, he had the window-walled up from which they looked out to admire the fountain. Among rich decorations in polychrome marble, four bronze children ride dolphins on shell-shaped basins sculpted by the Florentine Taddeo Landini, and since 1658 they have been "playing" with turtles, added to the fountain by Gian Lorenzo Bernini in 1658.

The most famous monument in the world and a symbol of the greatness of Rome, the Flavian Amphitheater, better known as the Colosseum for the colossal bronze statue of Nero that was nearby, stands in the archaeological heart of the city. The Colosseum, which is still the largest amphitheater in the world, was commissioned by Emperor Titus Flavius Vespasian who chose the area between the Palatine, Esquiline, and Caelian hills, previously occupied by the artificial lake of Nero's Domus Aurea, to build it. Its construction began in 70 A.D. and ended in 80 A.D. under the reign of Titus, son of Vespasian. In 438, Valentinian III abolished gladiatorial games and the amphitheater underwent a progressive decline that in the Middle Ages and Renaissance led it to be used as a quarry for materials, also used in the construction of St. Peter's Basilica, as a shelter for animals and as a venue for craft workshops and homes. The Colosseum, along with the Roman Forum and Palatine Hill, is part of the Colosseum Archaeological Park.

In Piazza Bocca della Verità there is the ancient marble mask, one of the most famous symbols of Rome, placed since 1632 in the pronaos of the Basilica of Santa Maria in Cosmedin. The large round, with a diameter of about 1.80 meters, was probably a manhole from the Roman era, dating back to the reign of Tarquinius Superbus, the last of the seven kings of Rome who built the Cloaca Maxima, a grandiose conduit for draining water. The name Mouth of Truth originated in 1485 and is linked to a curious and fascinating medieval legend, according to which the mouth could bite the hand of those who had not affirmed the truth. The tradition was widespread among jealous husbands, who brought their wives to the monument: after introducing their hand, women had to declare that they had not committed adultery.

In 1878, a few years after the unification of Italy, the Italian Parliament decided to dedicate a monument to King Vittorio Emanuele II. On that occasion, the grandiose equestrian statue in gilded bronze dedicated to Victor Emmanuel II was discovered. On November 4, 1921, the body of the Unknown Soldier was buried under the statue of the Goddess Rome in memory of the many soldiers who died in the war and whose name or burial place is unknown. The central theme of the entire monument is represented by the two inscriptions on the propylaea: "PATRIAE UNITATI" and "CIVIUM LIBERTATI", "To the unity of the homeland" and "To the freedom of the citizens. On either side, two fountains represent the Adriatic Sea and the Tyrrhenian Sea and mark the "borders" of the monument just as the two seas delimit the Italian Peninsula. Every year, on April 25, the anniversary of the liberation of Italy, June 2, Republic Day, and November 4, Armed Forces Day, the President of the Republic pays homage to the unknown soldier by laying a laurel wreath, in memory of all those who died for the Homeland.