The gate in the Republican walls, built in around the mid-1st century BC, marks the entrance into the city from the Via Laurentina, an ancient road leading from Laurentum (a town in Lazio south of Rome); the stretch of road inside the city was Ostia’s Cardo Maximus.
The gate’s modern designation seems to be derived from the name Laurentia, known from Christian sources.
The gate, consisting of a single room, was flanked by two square towers and had a facing of tufa blocks. On the south side the sockets for the wooden door can still be seen. In the Imperial period the western tower, having lost its original function, was used for the taurobolia (ritual bull sacrifices) that took place in the nearby sanctuary of the Magna Mater.
- The area of the eastern cults and the Porta Laurentina residential district
- Tempio Collegiale dei Fabri Tignuarii
- Santuario della Bona Dea
- Terme del Nuotatore
- Mitreo di Felicissimo
- Cd. Sede degli Augustali
- Fullonica su via degli Augustali
- Domus del Pozzo
- Domus del Protiro
- Complesso delle Terme del Filosofo
- Domus della Fortuna Annonaria
- Mitreo dei Serpenti
- Campo della Magna Mater
- Porta Laurentina
- Ninfeo degli Eroti
- Domus dei Pesci