Today, only a small part of the original rectangular gate is still visible; even though it was once supported by over 300 columns.
Before its reconstruction under Augustus, the gate enclosed the two temples of Juno and Jupiter Stator, the latter being the first temple built entirely with marble in Rome. In 23 BC Octavianus Augustus had it rebuilt and dedicated the portico to his sister Octavia.
Flanked by a library with two sections of latin and greek books, for many years it became a center of the cultural life of the city. Since the Middle Age the portico has been a big fish market, as you can still see from the inscription on a memorial stone.
In the proximity of Portico d'Ottavia there are some of our apartments: