Karthaia was one of the four ancient cities of Keos, and one of the three to mint coins. Today, the archeological site is still visitable after a hike of roughly an hour. Keos is the closest of the Cyclades islands to Athens.
700 BCE
The Lelantine War between Chalkis and Eretria results in a Chalkis victory and Eretria’s loss of Andros, Tenos, and Koressos, Ioulis, and Karthaia on Kea. Miletos joined the side of Eretria and Samos and Thessaly on the side of Chalkis.