In the framework of IMS research programs under the direction of Christos Loukos, a rich material has been collected from archives, published sources, bibliography, newspaper indexing, etc. It concerns especially Ermoupolis but also other cities and islands of the Greek state during the 19th and 20th century. the refugees from Crete during the 19th century, Rethymno, Asia Minor, Athens during the Occupation, etc., and is part of the themes of the history of cities, family, demography, epidemics and public health. Much of the information in the archival material has been fed into databases, which can be accessed online from the IMS-FORTH website.