Construction began in the 6th century B.C. until the end of the Western Roman Empire. A large number of religious and memorial buildings are concentrated in the square. The main part of the square is about 134 meters long and 63 meters wide. There is a Brazilian Lika (rectangular hall) on both sides for trial and assembly. The eastern end of the square is the Caesar Temple and the Arc de Triomphe of Augustus, and the western end is the parade stand and the Senate and the assembly hall in front of the northwest corner of another Arc de Triomphe Plaza of ancient Rome. The Caesar Temple and the Kitchen Temple and the Presbyterian Palace east of the Arc de Triomphe of Augustus are the religious centers. After the construction of Constantine Brasilica in the 4th century, the square expanded eastward and the Arc de Triomphe was built. There are also two temples in the early years of AD outside the parade desk at the western end. In the Middle Ages, several ancient Roman buildings were converted into churches. Since then, marble from ancient buildings has been continuously demolished for building or burning lime, so that apart from a few buildings, only ruins remain in the square complex. The excavation began at the end of the 18th century and was protected.