The Archcathedral Basilica of St. Peter and St. Paul in Poznań is one of the oldest churches in Poland and the oldest Polish cathedral, dating from the 10th century. It is the oldest historical monument in Poznań. It stands on the island of Ostrów Tumski north-east of the city centre.

Poznań is a city on the River Warta in west Poland, within the Greater Poland region. The city is an important cultural and business centre, and one of Poland's most populous regions with many regional customs such as Saint John's Fair, traditional Saint Martin's croissants and a local dialect. Among its most important heritage sites are the Renaissance Old Town, Town Hall and Gothic Cathedral.