COELIUS MONS, one of the seven hills of Rome, so called from Caesus, a Tuscan captain, who came to the assistance of Romulus against the Sabines, (Dionysius Halicarnassensis). Called also Querculanus, or Quercetanus, from the oaks growing on it; and Augustus, by Tiberius (Tacitus, Seetonius). To the east it had the city walls, on the south the Coelolus, to the west the Palatine, and on the north the Esquilina.