View of the Imperial Fora from the Templum Pacis in Rome, June 2012

In 75 AD, the Temple of Peace, also known as the Forum of Vespasian, was built under Emperor Vespasian. 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.

The shape of the square was also different: the temple was constructed as 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 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 ancient Rome, made in the Severan period (3rd century) by drawing on the marble slab that covered the wall. The wall is now part of the façade of the church of Santi Cosma e Damiano, where the holes used to mount the slabs of the map can still be seen. The Temple of Peace is also said to have housed the Menorah from Herod's Temple.

Text from: en.wikipedia.org/wiki/Imperial_fora