Four-year excavations and research on the extraordinary architectural findings of Kavos on the island of Keros in the Cycladic Islands group confirmed the existence in Early Cycladic times of a complex, stratified and technically expert society, according to ANA.The sanctuary at Kavos on the islet of Keros was a significant regional centre for all the Cycladic Islands, Greece's Ministry of Culture said at the conclusion of the research programme under Cambridge University.