"republican wall" . . "Servian" . . . . . . . "10.0" . "Servian Wall" . . . . . "wall" . "16 main gates" . "Servian regions" . . "walls of Rome" . "walls" . . "wall of Rome" . . "Servian city walls" . . . "Servian agger" . . . "4th century BC (Livy dates grotta oscura sections from 378 BC)" . . . . . . . . "first city walls" . "new wall" . . "Servian Wall" . . "\\\"Servian\\\" Wall" . "portion of surviving wall" .