If you get to the brand new sparkling Rynek and see a strange unidentified lying object at the end of Al. Korfantego, the odds are you're looking at Katowice's very own flying saucer! This multipurpose 'space age' sports and concert venue has a rather colourful history as you might expect and has the ability to play space tunes whenever the lights go on.
https://www.inyourpocket.com/katowice/spodek_32246v