The document discusses edit-a-thon events organized by Europeana Fashion to improve fashion-related Wikipedia articles. It provides details about a successful edit-a-thon hosted by the ModeMuseum (MoMu) in Belgium, including contributions of over 25 participants who edited 15 articles. MoMu also donated 33 images to Wikimedia Commons to catalyze contributions. Lessons learned highlight the importance of collaboration between cultural heritage institutions and Wikimedia chapters to engage volunteers and expose collections. Future areas of collaboration could include pattern-making articles on Wikidata and donating more contemporary, openly licensed content.