In 1990, the Colosseum, along with all the historical centre of Rome, the Vatican extraterritorial zones in Italy and the Basilica of St. Paul Outside the Walls, was listed as a World Heritage Site by UNESCO, while in July 2007 was included among the New seven Wonders of the World.

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 (Italian: Arco di Costantino) 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. [a] Dedicated in 315, it is the largest Roman triumphal arch, with overall dimensions of[1] 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 reverted in marble.

The Temple of Venus and Roma (Latin: Templum Veneris et Romae) is thought to have been the largest temple in Ancient Rome. Located on the Velian Hill, between the eastern edge of the Forum Romanum and the Colosseum, in Rome, it was dedicated to the goddesses Venus Felix ("Venus the Bringer of Good Fortune") and Roma Aeterna ("Eternal Rome"). The building was the creation of the emperor Hadrian and construction began in 121. It was officially inaugurated by Hadrian in 135 and finished in 141 under Antoninus Pius. Damaged by fire in 307,[1] it was restored with alterations by the emperor Maxentius.

The Palatine Hill, (/ˈpælətaɪn/; Latin: Collis Palatium or Mons Palatinus; Italian: Palatino [palaˈtiːno]) which is the centremost of the Seven Hills of Rome, is one of the most ancient parts of the city and has been called "the first nucleus of the Roman Empire." The site is now mainly a large open-air museum while the Palatine Museum houses many finds from the excavations here and from other ancient Italian sites. Imperial palaces were built here, starting with Augustus. Before imperial times the hill was mostly occupied by the houses of the rich. The hill originally had two summits separated by depression; the highest part was called Palatium and the other Germalus (or Cermalus). Using the Forma Urbis its perimeter enclosed 63 acres (25 ha); while the Regional Catalogues of the 4th century enclose 131 acres (53 ha).