In collaboration with the Technological Educational Institute of Ionian Islands (Section “Preservation of Cultural Heritage”) the maintenance and rehabilitation of war flags of two WW-II Hellenic submarines (H.S Glafkos, H.S Triton), restoration of the original religious image of St. Nicholas, was completed successfully. The specific image comes from World War II “Papanikolis Submarine. The whole task was held at N.H.D.