This impressive portico can be found overlooking the Jewish Ghetto. Although little more than ruins, it remains one of the most memorable buildings in the area.
Built in the 1st century AD, the portico was paid for by the first Roman emperor, Octavianus Augustus, who dedicated it to his sister, Octavia (hence its name).
Wikipedia https://en.wikipedia.org/wiki/Porticus_Octaviae
Address Via Tribuna di Campitelli 6, Rome, Latium, 00186, Italy
Coordinates 41°53'33.081" N 12°28'42.86" E