These refugees arrived in Kallithea mainly from the south Black Sea (Pontus), from ancient Greek cities such as Sinope (now Sinop, Turkey), Sampsus (now Samsun, Turkey), Kerasus (now Giresun, Turkey), Trapezous-Trebizond (now Trabzon, Turkey), Tripolis (now Tirebolu, Turkey), Argyroupolis (now Gümüshane, Turkey) and other remnants of the late Byzantine Empire.