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