Aventine

& s. [Lat. A vent in us.] A. As adjective : Pertaining to the Mons A vent in us, one of the seven hills on which Rome was built. B. As substantive: A military refuge, a tower, a defensive fort, a redoubt. "Into the castle's tower, The only Aventine that now is left him." Beaum. & Flet. (Good rich & Porter: Dict.)