The present diploma thesis focuses on the harbour complex of the city of Aegina, one of the most extensive and exceptionally well-preserved examples of an ancient harbour-city in the Greek territory, featuring both submerged and coastal remains dating from the Archaic to the Byzantine periods. The core subject of the study is the fortified military harbour, with preserved entrance towers and significant traces of naval infrastructure, including ship sheds (neosoikoi), as well as the broader protective system of harbour works, comprising breakwaters and successive rows of submerged conical stone mounds.

 The research component of the thesis builds upon the systematic documentation of previous studies and field surveys, with particular emphasis on cartographic and architectural recording. At the same time, it incorporates the interdisciplinary framework of contemporary underwater archaeology, including surface-level underwater survey, three-dimensional topographic documentation, photogrammetry, GIS-based spatial analysis, trial excavation trenches, and geoarchaeological and geophysical methods for seabed mapping.

 In its design component, the thesis does not pursue the reconstruction of the archaeological remains but instead proposes strategies for their interpretation and experiential accessibility through gentle, reversible, and landscape-oriented interventions along the coastal zone of Kolona. Alternative scenarios of spatial organization are articulated, ranging from high-impact permanent solutions to low-impact adaptive approaches, ultimately converging on a flexible system of modular floating platforms and circulation routes. This system is complemented by discreet, semi-buried support infrastructures serving both the public and researchers/divers.

 Overall, the proposal seeks to bridge archaeological documentation with contemporary experiences of the coastal landscape, enhancing the legibility of the submerged cultural heritage while avoiding permanent alteration of the site’s character.

Keywords: Underwater archaeology, Aegina Harbour Complex, Diving  park, Land - searoutes, Floating structures