Figure 1 Overview of sites mentioned in the text (map: D. Grofs, based on: © EuroGeographics for the administrative bounda- ries). 1: Hietaniemi (Finland); 2: Linnes (Norway); 3: Astuvansalmi (Finland); 4: Trasdttra (Sweden); 5: Zvejnicki (Latvia) 6: Tamula (Estonia); 7: Zvidze (Latvia); 8: Lake Lubans (Latvia); 9: Sulka (Latvia); 10: Sarnate (Latvia); 11: Gdansk (Poland); 12: Stupsk/Stolp (Poland); 13: Brzesé Kujawski (Poland); 14: Dolni Véstonice (Czech Republic); 15: Geifenklésterle (Germany); 16: Bonn-Oberkassel (Germany); 17: Fano (Denmark); 18: Lild Strand (Denmark); 19: Resen (Denmark). 20: Bolling So (Denmark); 21: Tangkrogen (Denmark); 22: Aleby (Sweden); 23: Catalhoyiik (Turkey).