<a href="https://en.wikipedia.org/wiki/ambigram" class="extiw" title="en:ambigram">Ambigram</a> <b><a href="https://en.wikipedia.org/wiki/Message" class="extiw" title="en:Message">Message</a> <a href="https://en.wikipedia.org/wiki/wikt:aberrant#Adjective" class="extiw" title="en:wikt:aberrant">aberrant</a></b> (<i>Aberrant message</i>, in French). 180° rotational symmetry. <a href="https://en.wikipedia.org/wiki/Self-reference" class="extiw" title="en:Self-reference">Self-referential</a> visual wordplay written on a parchment.
<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>