Edit-a-thon in Warsaw organised as part of the <a href="//commons.wikimedia.org/w/index.php?title=Europeana280&amp;action=edit&amp;redlink=1" class="new" title="Europeana280 (page does not exist)">Europeana280</a> competition (for details see <a href="https://en.wikipedia.org/wiki/pl:Wikiprojekt:GLAM/Muzeum_Narodowe_w_Warszawie/Europeana_Art_History_Challenge" class="extiw" title="w:pl:Wikiprojekt:GLAM/Muzeum Narodowe w Warszawie/Europeana Art History Challenge">Europeana Art History Challenge</a>)
<a href="//commons.wikimedia.org/wiki/User:Halibutt" title="User:Halibutt">Halibutt</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>