Both in the lagoon and in the sea in front of Grado many archaeological finds have need made linked to port activities associated with the emporium of Aquileia and the port of Grado. The bathymetric map of Nino Caressa for the area of sea in front of Grado, for example, shows stretches of road, the cluster of stones of San Gottardo, the remains of a pier, the wreck of a sunken ship with a cargo of amphorae, and more. In the lagoon instead, remains of villas, necropolises, warehouses and jetties have been found.