During the Republican period, the Regia was a religious centre.
In this building was established the administration of the college of
Pontifex, and the residence of the Pontifex Maximus (among whom the most
famous is Julius Cæsar, who lived there until he was assassinated).
The Regia was a vast building erected on the Forum, several times burnt down,
each time reestablished at the same place. Under its last version, in 36 BC,
it was a marble house, probably of pentagonal shape.
The walls were engraved with two series of essential documents for the history of Rome :
the Consular Pomp and the Triumphal Pomp. Inside, the Regia housed as well two small very
old sanctuaries of Mars and Ops Consiva
. The Regia lost most of its importance during the Empire.