Rome, Italy The Forum. "...a rectangular forum (plaza) surrounded by the ruins of several important ancient government buildings at the centre of the city of Rome. Citizens of the ancient city referred to this space, originally a marketplace, as the Forum Magnum, or simply the Forum." http://en.wikipedia.org/wiki/Roman_forum
Arch of Constantine - Rome After years of civil war, the victory of Constantine's army over the numerically superior army of Maxentius at the Battle of Milvian Bridge in 312 AD brought some peace to the Roman Empire. To commemorate this victory, the Senate of Rome awarded Arch of Constantine a triumphal arch. It was dedicated just a few years later, in 315 AD.