The article presents the direct human impact on the alterations of the dune. Anthropogenic activities caused the rebuild of dunes and landscape of the early medieval settlement complex in Kałdus near Chełmno (fig. 1, fig. 6). We determined phases of anthropogenic rebuild of the dune and the landscape transformations in varied periods (fig. 2, 3, 4, 5): (i) Late glacial - dune formation and landscape reconstruction from the beginning of Mezoholocen, (ii) Atlantic Period - Globular Amphora Culture - erecting a small dike on the top of the dune, (iii) on the turn of Subboreal and Subatlantic periods - building the defence dike with the settlement of the Lusatian-Pomeranian Culture and landscape reconstruction of the rampart surrounding, (iv) Subatlantic Period - building the St. Laurence Mountain in the Early Medieval Ages, and the landscape reconstruction of the early medieval settlement complex
