Poland’s first bishopric was established in Poz in 968AD, and from 1138–1295 Poznań briefly operated as the home of Poland’s Royal Court. The oldest point of interest is Ostrów Tumski, and though nothing remains of the 9th century fortress that once stood here the cathedral, Poland’s first, is open to visitors. The cathedral has had a tough time, destroyed and remodeled numerous times, though the crypt has survived the vicissitudes of time and contains the bodies of Poland’s first rulers – Mieszko I and Bolesław the Great.  A Romanesque cathedral was built on the spot in the 12th century and a Gothic structure went up in 1356-1410; in 1772 it received Late Baroque additions and classicist façade. Burnt down in 1945, it was reconstructed in 1946-1955 in the Gothic style. The oldest remains are in the cathedral crypt, where you can see sections of excavated walls that date back to the founding of Poland. St. Stanislaus' Chapel features an epitaph by sculptor Marian Konieczny; each November 1 a special mass in the chapel celebrates the souls of the kings and princes buried here. The Chapel of the Holy Sacrament houses several outstanding examples of Renaissance sculpture, including the multilevel tomb of the Gorka family. St. Martin's Chapel houses a painting by Poznań artist Krzysztof Boguszewski of the saint entering Amiens.

Crypt entrance 3/2zł, rest of the Cathedral free.