Nea Kios is historical continuation of Cius of Asia Minor, city of 15,000 residents built at the head of the gulf of Cius in Propontis, seat of the Metropolis of Nicaea and seaport of Bursa. Refugees of Cius, after the Asia Minor disaster of 1922, transferred to Kalamaria where they stayed few years before most of them move out for Argolis when they were given space to settle.