Ostrów Tumski in Poznań is a special place – here stood one of the most important strongholds of the first Piasts, whose remains can be seen in the archaeological open-air museum; here Mieszko I built the first masonry palace; here this ruler was baptised, bringing Poland into the sphere of Latin Christian culture.With the audio guide, we discover the remarkable monuments of Ostrów Tumski, above all the cathedral, which holds the remains of Poland's first rulers, and the Archdiocesan Museum; we soak up the atmosphere of this beautiful place; and we also take a look at the old districts across the river.