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The fortress occupied by the Sage of the Silver Vein and his soldiers

The Teichos of Herakles was a fortress dedicated to the legendary hero Herakles, located atop a peak in the Achaean region of Erymanthos Peaks, Greece. It served as the headquarters of Polemon the Wise, the Sage of the Silver Vein branch of the Cult of Kosmos.

Within the Teichos was an entrance into a cavern below, containing curious architecture and an equally curious chamber housing a strange trunk.[1]


During the Peloponnesian War, the Spartan misthios Kassandra explored the fortress, finding one of the Ainigmata Ostraka within.[2] She also tracked down Polemon, and slew him and his pet lynx.[3]

When the Order of the Storm branch of the Persian Order of the Ancients came to Achaia searching for Kassandra, Darius and Natakas, the men serving the Order captured locals and took them to the Teichos. There they were questioned about 'yellow-eyed man' and 'Eagle-bearing misthios '. Natakas asked Kassandra to help the people.[4] While rescuing the people, among them Kleta, Kassandra found a letter addressed to the Cult of Kosmos from the Order of the Storm, signed by the Tempest.[5]

Behind the scenes

The location of Teichos of Herakles in Assassin's Creed: Odyssey is based on the Teichus of the Dymaeans in Achaia, said to have been built by Herakles when he warred against the Eleans.

The name of the location contains the Greek word τεῖχος (teîkhos), which means 'fortification, castle, fortified city'.




  1. Assassin's Creed: Odyssey
  2. Assassin's Creed: OdysseyDye Dye Dye
  3. Assassin's Creed: OdysseyThe Silver Vein (memory)
  4. Assassin's Creed: OdysseyLegacy of the First Blade: Shadow HeritageInto the Storm
  5. Assassin's Creed: OdysseyLegacy of the First Blade: Shadow HeritageOn the Grapevine