The Imperial Fora consist of a series of monumental fora (public squares), constructed in Rome over a period of one and half centuries, between 46 BC and 113 AD. The forums were the heart of the late Roman Republic and of the Roman Empire.

The Imperial forums are not part of the Roman Forum, which was the public square during the Roman Republic. These forums were the centres of politics, religion and economy in the ancient Rome.

During the early 20th Century, Italian Prime Minister Benito Mussolini decide the revamp the Imperial Fora as part of his campaign to harp back to the great days of Roman and Italian history. Forum of Caesar Main article: Forum of Caesar

The forum of Caesar and the temple of Venus GenetrixJulius Caesar decided to construct a large forum bearing his name. This forum was inaugurated in 46 BC, though it was probably incomplete at this time and was finished later by Augustus.

The Forum of Caesar was constructed as an extension to the Roman Forum. The Forum was used as a replacement venue to the Roman Forum for public affairs as well as government; it was also designed as a celebration of Caesar's power. Caesar had placed, on the front of his forum, a temple devoted to Venus Genitrix, since Caesar's family (gens Julia) claimed to descend by Venus through Aeneas. A statue of Caesar himself riding Bucephalus, the celebrated horse of Alexander the Great, was placed in front of the temple, to symbolise absolute power.[citation needed] This centralised vision corresponded to the ideological function, following the propaganda of the Hellenistic sanctuaries; also the choice of the Forum site carried a meaning: the future dictator didn't want to be far from the central power, represented in the Curia, seat of the Senate. In fact, not long before Caesar's death, the Senate agreed to reconstruct the Curia on the site.

Forum of Augustus
Forum of Augustus with the temple of Mars UltorIn the battle of Philippi in 42 BC, in which Augustus and Mark Antony worked together and avenged Caesar's death, defeating the forces of Brutus and Cassius, Augustus vowed to build a temple dedicated to Mars Ultor (Mars the Avenger). The incomplete forum was inaugurated, after 40 years of construction, in 2 BC, adding the second monumental square, the Forum of Augustus.

This new complex lies at right angles to the Forum of Caesar. The temple consists of a very tall wall, and this still distinguishes itself from the popular neighbourhood of Suburra. This high wall served as a firebreak, protecting the Forum area from the frequent conflagrations from which Rome suffered. The rectangular square has long deep porticos with a surface that widens into large semicircular exedras.

Recently one more slightly smaller exedra was found south on the wall bordering the forum of Trajan. meaning that in sake of symmetry there must have been other exedra demolished to make room for the forum of Nerva, rising the number to 4 and not 2 exedras This completely changes the layout for the south part of the forum of Augustus, meaning that it is much more similar to the forum of Trajan, and a new theory for this southern part of the forum suggests that in fact there was a basilica between the 2 new exedras (like in the forum of Trajan). This supports the numerous ancient authors that tell us the forum was used has a court of law.

The entire decoration of the Forum was tightly connected to the ideology of Augustus. According to myth, Rome herself was born from the god Mars through Romulus. This is forum was occupied by many plebeians as well as senator.

Temple of Peace In 75 AD, under Emperor Vespasian, another great square was built. Separated from the Forum of Augustus, the Forum of Caesar and the Via dell'Argileto which connect the Roman Forum to the Subura, the temple faced the Velian Hill (in the direction of the Colosseum. The fact that this structure is not mentioned as having a civil function has prevented it from being classified as a true Forum. Therefore the structure was simply identified as the Temple of Peace (Templum Pacis) until the late Empire.

Also the shape of the square was different: the temple was constructed by a large apsidal hall that opened up like an exedra at the bottom of the portico. A row of columns distinguished the portico from the temple. The central area was not paved like other fora, and it served as a garden, with pools and pedestals for statues, so that it was similar to an open-air museum.

The monument was built to celebrate the conquest of Jerusalem. One of the chambers opened at the end of the porticos housed the Forma Urbis Romae, a marble map of antique Rome, made in the Severan period (3rd century) by drawing on the marble slab that covered the wall.

Forum of Nerva, or the Transitional Forum

Remains of the peristyle which defined the Forum of Nerva.Domitian decided to unify the previous complex and the free remaining irregular area, between the Temple of Peace and the Fora of Caesar and Augustus, and build another monumental forum which connected all of the other fora.

The limited space, partially occupied by one of the exedrae of the Forum of Augustus and by the via dell'Argileto, obliged Vespasian to build the lateral porticos as simply decorations of the bounding walls of the forum. The temple, dedicated to Minerva as protector of the emperor, was built leaning on the exedra of the Forum of Augustus, so that the remaining space became a large monumental entrance (Porticus Absidatus) for all the fora.

Because of the death of Domitian, the forum was inaugurated by his successor, Nerva, who gave his own . The Forum of Nerva is also known as Transitional Forum, because it worked as an access way, just like via dell'Argileto had done.

The forum of Trajan and the visible part of the Trajan's market The Forum on a coin by Trajan.It is probable that Domitian's projects were more ambitious than the building of the small "Forum of Nerva", and probably under his reign they started to remove the small saddle that united the Capitoline Hill to the Quirinal Hill, thus blocking the Fora towards Campus Martius, near to modern Piazza Venezia.

The project was resumed by Trajan with the construction of Trajan's Forum between 112 and 113. The occasion was the conquest of Dacia, whose spoils paid for this celebration of the military conquests of Rome.

The preparation of the Forum required a lot of work. It was necessary to remove the hilly saddle, and to support the cut of Quirinal Hill through the building of the Trajan's market. The Forum square was closed by the Basilica Ulpia, with Trajan's Column at its back. In front of the basilica, a monumental façade was the background of a large, equestrian sculpture of the Emperor. The last Forum was also the biggest and greatest.