Mermaid and sword
by Firkin - uploaded on January 7, 2018, 1:31 am
At the time I uploaded this, the original by tadmac was under question as potentially a logo that was not public domain. Part of that logo was a mermaid with a sword which seems to be public domain, being part of an official insignia of Warsaw. The original was rather roughly represented, so I re-drew it from a public domain drawing of Warsaw's flag/COA on Wikimedia Commons.