This square, from where you can enjoy panoramic views, was born according to the criteria of a uniform project due to the genius of Michelangelo; it stands on the Capitoline hill, where an ancient village was located, and the place was chosen to dedicate numerous temples to the Roman deities.

It was obtained by cutting the Quirinale and the Campidoglio slopes, connected by a mountain saddle. The excavation works were probably started under Domitian, in parallel with the arrangement of the Forum of Nerva. The undertaking, which had to be interrupted after the death of this emperor, murdered in a conspiracy in 96 AD, was continued by Trajan and financed with the booty obtained from the conquest of Dacia (now Romania), conducted in two subsequent military campaigns (101 -102 and 105-106 AD) and ended with the defeat and submission of the Dacians and the death of their king Decebalus. The architect of the work was Apollodorus of Damascus, a military engineer who had accompanied the emperor in the victorious war. The plan of Trajan's Forum was more articulated and complex than that of its predecessors: it included a vast square flanked by porticoes with exedras behind them, dominated on one side by the imposing Basilica Ulpia, behind which stood the Trajan's Column.

Trajan's Column narrates in images the two military campaigns of 101-102 and 105-106 AD. with which the emperor Trajan (98-117 AD) conquered Dacia, mainly corresponding to present-day Romania. Thanks to the extraordinary war booty, Trajan was able to build the most majestic of the Forums of Rome, which took its name from him and was inaugurated in 112 AD. The Column was erected in the center of a courtyard delimited by the monumental entrance to the Forum by the Basilica Ulpia and by the two libraries to the east and west. It rests on a base decorated with bas-reliefs depicting stacks of weapons. The shaft, 100 Roman feet high (30 meters), is composed of 17 colossal rocks of white Carrara marble, with a diameter of almost 4 meters. Inside is a spiral staircase of 185 steps leading to the top. The frieze is arranged around the shaft, imagined as a spirally wrapped scroll, approximately 200 meters long in total and densely animated with scenes with about 2,500 characters.

Roman Forum, Latin Forum Romanum, the most important forum in ancient Rome, is situated on low ground between the Palatine and Capitoline hills. The Roman Forum was the scene of public meetings, law courts, and gladiatorial combats in republican times and was lined with shops and open-air markets. Under the empire, when it primarily became a centre for religious and secular spectacles and ceremonies, it was the site of many of the city’s most imposing temples and monuments. Among the structures surviving in whole or in part are the Temple of Castor and Pollux, the Temple of the Deified Caesar, the Mamertine Prison, the Curia (senate house), the Temple of Saturn, the Temple of Vesta, the Temple of Romulus, the Arch of Titus, the Arch of Septimius Severus, and the Cloaca Maxima.

The Arch of Constantine is a triumphal arch in Rome dedicated to the emperor Constantine the Great. The arch was commissioned by the Roman Senate to commemorate Constantine's victory over Maxentius at the Battle of Milvian Bridge in AD 312. Situated between the Colosseum and the Palatine Hill, the arch spans the Via Triumphalis, the route taken by victorious military leaders when they entered the city in a triumphal procession. Dedicated in 315, it is the largest Roman triumphal arch, with overall dimensions of 21 m (69 ft) high, 25.9 m (85 ft) wide and 7.4 m (24 ft) deep. It has three bays, the central one being 11.5 m (38 ft) high and 6.5 m (21 ft) wide and the laterals 7.4 m (24 ft) by 3.4 m (11 ft) each. The arch is constructed of brick-faced concrete riveted in marble. Though dedicated to Constantine, much of the sculptural decoration consists of reliefs and statues removed from earlier triumphal monuments dedicated to Trajan (98–117), Hadrian (117–138) and Marcus Aurelius (161)