A Wikipedian in residence or Wikimedian in residence (WiR) is a Wikipedia editor, a Wikipedian, who accepts a placement with an institution, typically an art gallery, library, archive, museum, cultural institution, learned society, or institute of higher education to facilitate Wikipedia entries related to that institution's mission, encourage and assist it to release material under open licenses, and to develop the relationship between the host institution and the Wikimedia community. A Wikipedian in residence generally helps to coordinate Wikipedia-related outreach events between the GLAM and the general public such as editathons.

The National Library of Wales, in Aberystwyth, is the national legal deposit library of Wales and is one of the Welsh Government sponsored bodies. It is the biggest library in Wales, holding over 6.5 million books and periodicals, and the largest collections of archives, portraits, maps, and photographic images in Wales. The Library is also home to the national collection of Welsh manuscripts, the National Screen and Sound Archive of Wales, and the most comprehensive collection of paintings and topographical prints in Wales. As the primary research library and archive in Wales and one of the largest research libraries in the United Kingdom, the National Library is a member of Research Libraries UK (RLUK) and the Consortium of European Research Libraries (CERL).