The Porta Laurentina or Laurentine Gate belongs to the city walls of the first century BC. It received its (modern) name from the village Laurentum, to the south of Ostia. Beyond the gate was a huge necropolis, starting at a distance of c. 50 metres. The gate was excavated in 1938-1942.
Plan of the Porta Laurentina. SO I, fig. 26.
The gate consists of a single room, made of large tufa blocks. On the south side are grooves for the wooden doors. In the east side a hole has been preserved, in which a beam that blocked the door was inserted. On either side of the gate is a square tower, with sides of 5.85 metres.