The temple of Rome and Augustus was erected in the late first century BC east of the Parthenon or of the Erechtheion. Several architectural elements of the building were found east of the Parthenon and many more were brought here after their discovery elsewhere. Nearby are the irregular tufa foundations (approximately 10.50x13 metres) of a building generally considered to be the Roman temple. Another theory, however, based on the construction technique of these foundations and on depictions of the Acropolis on Roman coins, places the temple east of the Erechtheion.

The inscription on the temple's epistyle mentions that the building was dedicated by the city of Athens to the goddess Rome and to Octavian Augustus. Pausanias does not mention the building during his visit to the Acropolis, possibly because it did not present any interest at his time. The small, circular temple had a single row of nine Ionic columns and no interior wall, the entablature and conical roof being entirely of white marble. The fact that the columns imitate those of the Erechtheion may indicate that the temple was built by the same architect who repaired the Erechtheion after it was damaged by fire.