ON THE GATES

† g i ...the borders of the Roman people, the Pomerium The sacred boundary of Rome. HE ENLARGED AND DEFINED. original: "AMPLIAVIT TEMINAVITQ." This refers to an inscription by Emperor Claudius, who famously extended the city's ritual limits.
I have written several things regarding the institutions of the City itself in a small booklet; it seems superfluous to repeat those things here.

On the gates of the City.

Romulus, the first king of the Romans, had enclosed the City with only three gates, although some assert there were four.
Mugonia The first was called the Mugonian Gate, named from the lowing Latin: mugitus of animals, which was also later called the Trigonian Gate.
Carmentalis The second was the Carmentalis Gate, named after Carmenta, the mother of Evander A figure from Roman mythology who brought the Greek alphabet and gods to Italy.; it was later called the Accursed Gate Latin: Scelerata. It earned this name because the 306 Fabii marched through it to their deaths at the Battle of the Cremera. and was located not far from the Temple of Janus.
Pandana The third was indeed called the Pandana or the Romanula; it was also called the "Free" gate. Pompilius Numa Pompilius, the second king of Rome. established that it should remain closed in times of peace, as Piso Lucius Calpurnius Piso Frugi, a Roman historian and statesman. says in his Annals. Livy says that in his own time there were 37 gates in the City. Pliny, however, says there were 30, although he confirms that seven were closed. In our own age, however, there are 20, including those contained within the Leonine City The area surrounding St. Peter's Basilica, enclosed by walls built by Pope Leo IV in the 9th century to protect the Vatican from raids..
Triumphalis The first main gate was called the Triumphal Gate, which was the most famous of all, located not far from the Church of Santo Spirito.
Flaminia The second was the Flumentana Gate, but it was later called the Flaminia Gate after the Road The Via Flaminia, a major Roman road leading north.; today it is called the Porta del Popolo.
Collatina The third was the Collatina Gate, which led to Collatia, a town of the Sabines; later it was called the Pincian Gate after Pincius the senator, a name which it still retains today.