Ostrow Tumski Poznan
Ostrow Tumski (Cathedral Island) is the oldest part of Poznan, an island in the Warta River with the Cathedral of Saints Peter and Paul (free to enter the nave, crypt paid) and the Interactive Centre for the History of Ostrow Tumski (paid, modest). The island is considered the birthplace of the Polish nation (the first Polish ruler was baptized here in 966).