Derivative work from the original portrait of Leonardo da Vinci, in public domain. The added graphic in the top-left corner symbolizes the level of awareness, or more precisely: the effort to understand what is really meant by <i>level of awareness</i>. That change has been done in order to use the picture in books or other materials pertaining the man's level of awareness and spirituality.
<ul><li><a href="//commons.wikimedia.org/wiki/File:Possible_Self-Portrait_of_Leonardo_da_Vinci.jpg" title="File:Possible Self-Portrait of Leonardo da Vinci.jpg">Original file</a>: OldakQuill <a href="//commons.wikimedia.org/wiki/User:OldakQuill" title="User:OldakQuill">User:OldakQuill</a></li>
<li>Derivative work: <a href="//commons.wikimedia.org/wiki/User:Decio_Mure" title="User:Decio Mure">Decio Mure</a></li></ul>
Wikimedia Commons picture: <a href="//commons.wikimedia.org/wiki/File:Possible_Self-Portrait_of_Leonardo_da_Vinci.jpg" title="File:Possible Self-Portrait of Leonardo da Vinci.jpg">Possible self portrait of Leonardo da Vinci</a>