The collection comprises a wide range of items relating to the history and activities of Oriel Myrddin Gallery from 1991 to 2022 when it closed to the public for an extensive refurbishment and expansion project. Items include documents relating to its re-opening as a public venue in 1992, with plans and reports on the visual arts in the former county of Dyfed and its existing resources in the form of exhibition spaces maintained by Dyfed Cultural Services Department.
Included are exhibition catalogues with accompanying posters, press releases, correspondences between artists and curators. There is also an extensive photographic, slide, and Compact Disc collection with exhibition installation images, participating artists and individual artworks. It also contains a list of documents detailing activities provided by the gallery’s outreach programme for the public, schools and other educational organisations.