Changes to the coastline in the neighbourhood of the Medieval harbour in Puck, in the light of the research made by the Polish Maritime Museum in Gdańsk

The site was discovered in 1977 by amateur scuba divers. During preliminary excavation in the Puck Lagoon, a massive system of timber structures, fascine, and stone as well as earthen embankments scattered over an area of over 12 hectares, were found. Looking at the chronological arrangement of the site, slowly reconstructed on the basis of dendrochronological analyses and supplemented with radiological research, it should be assumed that the northern strip of the construction is a continuation of the quay strengthening construction, the root of a harbour pier. It is probably the earliest stage of the Puck harbour development. Taking both the layout of the construction, working as defences of the swampy alluvial estuary of the Płutnica river, parallel to the present coastline, as well as chronological layout of the stand, which gets younger and younger the closer it gets to the present shore line, it may be assumed that the changes in the location of the port construction were influenced by quite quick deepening of the basin and movement to the south of the medieval shore line.