This document discusses bringing contemporary art information to Wikipedia through collaborations between art museums, libraries, and Wikimedia organizations. It describes edit-a-thon events hosted by the Kiasma art museum and Wikimedia Finland where volunteers work together over one day or more to add and improve Wikipedia articles related to contemporary art and the participating institutions. These events aim to increase awareness of contemporary art and open cultural collections by making information and resources more accessible on Wikipedia. The document encourages cultural institutions to engage with Wikipedia as part of their regular work through various activities like hosting edit-a-thons, donating images and works to Wikimedia Commons, directly editing Wikipedia articles, and participating in the Wikipedian in Residence program.