Caspiae Portae

CA´SPIAE PORTAE [CASPII MONTES]

or Pylae (Κάσπιαι Πύλαι). The Caspian Gates; a name given to several passes through the mountains round the Caspian. The principal of these was near the ancient Rhagae or Arsacia. Being a noted and central point, distances were reckoned from it (Polyb. v. 44, 5).