Modification of "Brillenapostel" painting with man wearing "glasses with magenta colored filters", to eliminate the green from the image to reveal the hidden content.
<p><a href="//commons.wikimedia.org/wiki/File:Conrad_von_Soest,_%27Brillenapostel%27_(1403).jpg" title="File:Conrad von Soest, 'Brillenapostel' (1403).jpg">File:Conrad_von_Soest,_'Brillenapostel'_(1403).jpg</a>
</p>
<ul><li>Author: <span class="int-own-work" lang="en">Own work</span>, 18 November 2014</li></ul>