The sediments of Lake Kwiecko, located in the eastern part of the Bytowskie Lake District (part of the West-Pomeranian Lake District, Poland), were studied by pollen analysis. Holocene vegetation history was reconstructed from the beginning of the Preboreal to the Late Middle Ages. On the basis of the curves of selected taxa and the occurrence of plant indicators of the presence of man 6 settlement phases were distinguished and correlated with archaeological data. The investigations have shown that the fi rst week palynological indications of human presence around the lake were connected with the Atlantic chronozone, while the strongest impact of man on vegetation was recorded in the Middle Ages and modern times.