The General State Archives of Greece have shared with us two texts regarding the historical presentation of the archival collections of the GAK-Historical Archive of Macedonia, published the first by the Museum of Byzantine Culture and the second by the History Center of the Municipality of Thessaloniki. The first deals with the educational archives in Thessaloniki in the first half of the 20th century and the second concerns the municipal archives, and in particular the Municipality of Kalamaria, Thessaloniki, in the second half of the 20th century.