The Cathedral of St. John the Baptist, located in the Ostrow Tumski district, is a Gothic church with Neo-Gothic additions.
The construction of the Cathedral was started in 1244–1277, when Bishop Thomas I raised its eastern part.
However, four different churches preceded it, built successfully in the same the place.
In the moment, when the oldest part of the Cathedral came into existence, it was the first Gothic temple in Poland.
In the XIV century thanks to the famous bishop Nankier the main nave and sacristy were raised.
In the XV century the northern tower was built and almost a hundred years later, the second one was added from the south. Both were topped with new helmets.
At present the cathedral is a triple-naved basilica, which has the length of 100 meters and width of 44,5 meters. The western elevation is adorned by two beautiful, 100 meter towers.