The origin of the name Ios given to the Cyclades Island probably comes from the Ionians settlement and that the Island was already inhabited during the early Cycladic period. The most important prehistoric settlement that was found on the island is located upon a hill to the entrance of the port.
Ios is also the island where many historical reports attest that the great epic poet Homer was buried. According to Herodotus, the last resting place of Homer is a ruin in Plakotos, situated in the northern part of the Cyclades Island, called Homer's tomb; a great myth that Ios inhabitant keep alive with pride.
Ios Island’s history is similar to the others Islands of the Cyclades in Greece. In ancient times, Ios joined the Athenian Alliance and in the beginning of the 13th Centurythen came under Venetian rule. In the 15th Century, it came under the authority of the Venetian family of Crispus, which fortified the previous castle (Castro) of Chora, whose ruins are visible up to today. In 1537, the island suffered from pirate raids and later, Ios fell to the hands of Ottomans.