Arch of Augustus foundations and Temple of Vesta, Forum Romanum in Rome, the Palatine Hill to right

The Arch of Augustus was the triumphal arch of Augustus, located in the Roman Forum. It spanned the road between the Temple of Castor and Pollux and the Temple of Caesar, near the Temple of Vesta. Built in 20 BC, it commemorated the return of the Parthian standards and replaced the earlier Arch of Octavian built on the same spot in 29 BC, to commemorate the Battle of Actium (31 BC) against Mark Antony and Cleopatra.
An inscription was found in the same location in 1546 AD, with a dedication to Augustus, so the identification of the arch is certain even though very little remains of the arch itself. Its appearance is known from Augustan coins. It had three passageways, the first such arch in Rome, and served as a model for the Arch of Septimius Severus, which was the model for the Arch of Constantine.

The Temple of Vesta (Latin Aedes Vestae, Italian Tempio di Vesta) is an ancient edifice in Rome, Italy, located in the Roman Forum near the Regia and the House of the Vestal Virgins. The temple's most recognizable feature is its circular footprint. Since the worship of Vesta began in private homes, the architecture seems to be a reminder of its history. The extant temple used Greek architecture with Corinthian columns, marble, and a central cella. The remaining structure indicates that there were twenty Corinthian columns built on a podium fifteen meters in diameter. The roof probably had a vent at the apex to allow smoke release.

The Palatine Hill (Latin: Collis Palatium or Mons Palatinus; Italian: Palatino) is the centermost of the Seven Hills of Rome and is one of the most ancient parts of the city. It stands 40 metres above the Forum Romanum.

more on https://en.wikipedia.org/wiki/Arch_of_Augustus,_Rome , https://en.wikipedia.org/wiki/Temple_of_Vesta and https://en.wikipedia.org/wiki/Palatine_Hill