The thumb graphic from the Facebook "like" button.
original uploader was <a href="https://it.wikipedia.org/wiki/User:Dry_Martini" class="extiw" title="it:User:Dry Martini">Dry Martini</a> at <a class="external text" href="https://it.wikipedia.org">it.wikipedia</a>
11 May 2011 (original upload date)
<p>Transferred from <a class="external text" href="https://it.wikipedia.org">it.wikipedia</a><br></p>
(Original text : <i><span class="int-own-work" lang="en">Own work</span></i>)