Map of Upper Silesia in Silesian German.
<a href="//commons.wikimedia.org/wiki/User:Schl%C3%A4singer" title="User:Schläsinger">Schläsinger</a>
CC BY-SA 4.0
downloaded and modified by <a href="//commons.wikimedia.org/wiki/User:Schl%C3%A4singer" title="User:Schläsinger">Schläsinger</a> from <a href="//commons.wikimedia.org/wiki/User:Gaj777" title="User:Gaj777">Kamil Czaiński</a>