The Porta Aurelia-Sancti Petri was one of the gates of the Aurelian walls in Rome (Italy).

The Porta Cornelia was immediately west of the bridgehead of the Pons Aelius, the current Ponte Sant'Angelo.

Constantine the Great had Old St. Peter's Basilica built in the 4th century, over the Roman and Christian necropolis on Via Cornelia.

The Basilica and this northern entrance to Rome, however, had to be able to be defended, and between 401 and 403 the Emperor Honorius had the Mausoleum of Hadrian converted into the Castel Sant'Angelo.

The Porta Cornelia was built into the defensive walls of the Castle and gave access to the Vatican from the city.