The monument is located in the extreme western sector of the urban area, on the line of the walls, a few meters to the north of the route of the Latina and the remains of the Porta Romana.
It was one of the towers that formed part of the defense system of the city. The monument is built of large blocks of travertine. The building technique is polygonal work. The plan of the structure is almost square, and measures 6.40 x 6.80 m., with a high stored for a maximum of 2.80 m.
The set of building characteristics and historical considerations establish the dating between the late IV-III centuries. B.C.