<a href="https://en.wikipedia.org/wiki/ambigram" class="extiw" title="en:ambigram">Ambigram</a> logo <a rel="nofollow" class="external text" href="http://ambigramme.com"><b>ambigramme.com</b></a> (in French). Rotational symmetry of 180 degrees. Black on white background.
<a href="//commons.wikimedia.org/wiki/User:Basile_Morin" title="User:Basile Morin">Basile Morin</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>