Built in Homeric times c. 638-644 BC, the original Plueron was destroyed by Demitrius II and lies a little south of this, the new city, built after 234-235 BC in a more elevated position. Old Pleuron is mentioned in the Iliad in the catalogue of ships that sailed against Troy, and the epithet Pleuroios is referred to in Mycenaean Linear B inscriptions from Pylos. The site overlooks the plains and lagoons around Messolonghi. The reservoir was carved into the bedrock with an estimated capacity of 2, 500 cubic meters. Five walls supported a wooden roof and 3 triangular openings allowed water to flow from section to section. Archaeologically, Pleuron is very important, constituting along with Oiniades and Palairos, the most characteristic examples of Hellenistic defencive architecture in western Greece.