Not to be confused with Katowice's similarly-named church which it was built right before (from 1886-1900 to be exact), this fearsome cathedral is a striking example of neo-Gothic architecture, and comes replete with mesmerizing stained glass windows, glazed bricks and a mosaic above the entrance featuring the saints who gave their name to this structure. Elevated to the status of cathedral in 1992, Peter and Paul’s is home to what is recognized as the best organ in Upper Silesia, a Rieger, making it the venue of choice for organ recitals and other such sacral concerts.