This gate was made when Pope Urban VIII wanted to reinforce the city walls to protect the Janiculum hill. The architect who designed it was Marcantonio De Rossi, the same one who built the new walls. But by the time the door was finished, Urban VIII was already dead, and his successor Innocent X placed his symbol on the door.

The door doesn't look very nice, because things are missing, like the statues in the niches, the towers on the sides and the battlements above.

From this gate starts a road that goes towards the sea, where the port of Rome was.