Pistyrus or Pistyros (Ancient Greek: Πίστυρος), or Pistirus or Pistiros (Πίστιρος),[1] or Bistirus or Bistiros (Βίστιρος),[2] also known as Pisteira (Πίστειρα),[3] was an ancient Greek polis on the coast of Edonis, in ancient Thrace.
[4] The army of Xerxes I passed by Pistyrus after crossing the Nestus River.
[5] The name Pistyrus was also applied to the adjoining lake (now called Vasova), which was described by Herodotus as 30 stadia in circumference, full of fish, and exceedingly salty.
[5] Pistyrus has been identified with the remains of a fortified settlement east of Pontolivado located near the Vasova salt lake.
Among the finds are coins from Neapolis and Thasos, dated to 520–510 BCE.