Caspiae Portae
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).