Figure 12: (1) Sonographs showing the limestone blocks of the circular construction resting on a wooden ground plate of the eastern Canopus city (1a): Side Scan sonar image, (1b): ROV images, (2): Sonographs showing the circular construction of brick and mortar on the northern part of Heraklion city (2a): Side Scan sonar image, (2b): ROV images.