Gniezno’s history and character are inextricably intertwined with its cathedral, an imposing, double-towered brick Gothic structure. The present church was constructed after the Teutonic Knights destroyed the previous Romanesque cathedral in 1331. Chapels sprouted up around it, and the interior was redecorated in successive styles. After considerable damage in WWII, it was rebuilt according to the original Gothic structure. You can climb the tower for city views. The audio guide takes in the cathedral, tower, crypt and Romanesque bronze doors.