Archcathedral Basilica of St. Peter and St. Paul
Poznań, Poland · built 1880
The Sts. Apostles Peter and Paul Archcathedral Basilica 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.
Cathedral data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).