...be the head of lofty cities, the allusion being to Rome. It seems probable from G. 4. l. c. that the palace of the river-nymphs is supposed to extend to a considerable length under the stream, and so Tiber here may speak of his home as extending to the place where Rome was after wards built. A place called Tiberina atria, of which Virg. may perhaps be thinking here, is mentioned by Ov. Fasti 4....