Porta Praenestina

Porta Praenestina was a landmark in Rome. It was a gate located in the south east of the city and featured in Assassin's Creed: Brotherhood.

Database Entry
''Like the Porta Tiburtina, this gate was originally built to support aqueducts, namely the Acqua Claudius and the Acqua Anio Novous, both of which crossed two arterial roads of Rome. The Porta was later incorporated into the Mura Aureliane (Aurelian Walls) in an effort to expedite the project. Several bodies can also be found entombed in the walls, another famous Italian money-saving device.''

Source

 * Assassin's Creed: Brotherhood