Arch of Augustus - Credit: Wikimedia Commons
The Arch of Augustus (, ) was the triumphal arch of Augustus, located in the Roman Forum. It spanned the Via Sacra, between the Temple of Castor and Pollux and the Temple of Caesar, near the Temple of Vesta, closing off the eastern end of the Forum. It can be regarded as the first permanent three-bayed arch ever built in Rome.Holland, The Triple Arch of Augustus, p. 53. Read more on Wikipedia
Source: en.wikipedia.org