Ara Pacis
In 9 BC, this altar was built to commemorate the great peace after the Gallic and Spanish campaigns. The Ara consists of a rectangular enclosure inside of which is found the actual altar. The most significant scene in the mostly restored bas-relief is the one depicting Augustus, Agrippa, Julius, and Tiberius. Along the base of the wall that runs along the Via di Ripetta is a bronze reproduction of Augustus' testimonial plaque, called by historians the "Res Gestae" (Deeds accomplished).
Arc of Constantine
The People and Senate of Rome built this arch out of pre-existing materials in 315 AD for both the tenth anniversary of the great emperor, and in honor of his victory over Maxentius at the battle of Ponte Milvio in 312.
Circus Maximus
This oval basin, nearly 600 meters long, is almost entirely filled in with dirt. It was once a race track. It was made in the time of the Etruscan kings (presumably Tarquinio Prisco). Augustus adorned the brick structure with an imperial stage, which was rebuilt by Trajan, enlarged by Caracalla and restored by Constantine. During the reign of Constantine, the Circus could hold more than 200,000 spectators. Today only the outline remains (the area it occupied is now a public garden).
Colosseum
The original name for the Colosseum is Anfiteatrum Flavium. It was built by emperor Vespasiano and inaugurated in 80 A.D. In ancient times it was the site of the "Naumachie" or navy-battles, the "Munera" or gladiator-fights,and the "Venationes" or wild animal-hunts.It could hold up to 87.000 people.
Roman Forum
The Roman Forum was the centre of the civic and economic life of Rome in the Republican era and kept its prominent role even in the Imperial age. The monumental complex lies between the Capitol, the Imperial Fora, the Colosseum and the Palatine.
Pantheon
The inscription on the architrave of the portico "M. Agrippa L. F. Cos tertium fecit" refers to a temple erected by Agrippa in 27 B.C. to the tutelary divinities of the Julia family. In reality Agrippa's building was destroyed by a great fire in A.D. 80. Recent studies have proven that the present Pantheon is a reconstruction of the temple from the time of Hadrian. The interior measures 43,40 metres in diametre, and the same in height. Light and air still enter through the opening at the top (a circle of 8m. 92cms in diameter).