Arch of Augustus
The Arch of Augustus is an arch situated in the city of Rome, Italy. Though now in ruins, its appearance can be found on coins from the period. It consisted of three major arches very similar to the Arch of Constantine. Between the Temple of Julius Caesar and the Castor and Pollux temple one can find the remnants of the Arch of Augustus. The triumphal arch had three passage ways. It marked the beginning of the excessive building of monuments at the Forum.

From: www.wikipedia.org