Katowice. Plaque dedicated to <a href="https://pl.wikipedia.org/wiki/Stanis%C5%82aw_Mastalerz" class="extiw" title="pl:Stanisław Mastalerz">pl:Stanisław Mastalerz</a>.
<a href="//commons.wikimedia.org/wiki/User:Piotrus" title="User:Piotrus">User:Piotrus</a>
CC BY-SA 3.0
<span class="int-own-work">Self-photographed</span>