The Porta Viridaria was an ancient medieval structure that served as one of four city gate entrances in Rome.
The Porta Viridaria is one of the oldest gates in the walls surrounding the Vatican. It opens into Leonine City, or the Borgo, an independent municipality that sits at the entrance to the Vatican. Both were encolosed by the Leonine Walls in 852 to defend against invaders.
- The Porta Viridaria has many other name including Porta San Petri, Porta di Belvedere, Porta San Pellegrino, Porta Palatina, Porta Aurea and Porta San Peregrini. This is mocked in its database entry by Shaun Hastings.