Arch of Augustus

The Arch of Augustus is an Ancient Roman arch constructed in the city of Susa, Piedmont, in the province of Turin. It was built in 9–8 BC to record the renewed alliance between Emperor Augustus and Marcus Julius Cottius, a Celto-Ligurian ruler who had been made king and Roman prefect of the Cottian Alps. The arch, together with other remains from the period, such as the Roman amphitheatre and a Roman aqueduct, underscore the importance that the city of Susa had during the Roman period.

From above, the arch forms a rectangle 11.93 metres long and 7.3 metres wide. It rests on two large bases and there is only one archway. The white marble of the arch was sourced from a nearby quarries at Foresto and Tre Piloni. The arch has a unique arcade, in which the archivolt is supported by pilasters. The entablature rests on four Corinthian columns placed at the extremities of each corner, such that a quarter of each drum is embedded in the monument. The lowest architrave is composed of three bands of which the lowest band is thicker than the middle band, and this in turn is thicker than the top band. Above the architrave, a frieze composed of a bass relief stretches around all four sides. Above that is the cornice which has twenty-two corbels on each face and twelve on each side of the arch. The corbels' panels are decorated with roses. On top of that rests the attic, which displays an inscription on both faces, likely originally set with bronze letters. They are both inscribed similarly except for the inclusion of an extra P on the inscription facing north, likely for the honorific title of Pater Patriae. Since Augustus was not given this title until 2 BC, it was likely a later addition. The inscription reads:

Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).