The monumental stairway of 174 steps was built in 1723–1725 to link the Bourbon Spanish Embassy, and the Trinità dei Monti church that was under the patronage of the Bourbon kings of France, both located above — to the Holy See in Palazzo Monaldeschi located below. The stairway was designed by architects Francesco de Sanctis and Alessandro Specchi.

It is the largest Baroque fountain in the city and one of the most famous fountains in the world.

The Pantheon from Greek Pantheion, "temple of all the gods" is a former Roman temple, now a church, in Rome, Italy, on the site of an earlier temple commissioned by Marcus Agrippa during the reign of Augustus (27 BC – 14 AD). It was completed by the emperor Hadrian and probably dedicated about 126 AD.

The Colosseum, also known as the Flavian Amphitheater, stands as a symbol of the architectural brilliance and grandeur of ancient Rome. Built between 70–80 AD, this monumental structure was the largest amphitheater of its time and remains one of the most iconic landmarks in the world. Highlights: A Glimpse into Gladiator History: Once the site of epic gladiatorial combats, animal hunts, and public spectacles, the Colosseum could host over 50,000 spectators. Impressive Architecture: Marvel at its elliptical design, with towering arches, intricate engineering, and an underground complex known as the hypogeum, where animals and fighters were kept before the games.