ARTstor is collaborating with the University Library at the University of Illinois at Urbana-Champaign to share approximately 9,100 images from a variety of special collections in the ARTstor Digital Library. The collection in ARTstor will consist of images digitized from visual materials held in the University Library, which are relevant to a variety of fields, including Irish political history, theater and costume history, and campus architecture and design. The University Library’s Rare Book & Manuscript Library is the principal repository for early manuscripts and rare books, including three special collections that will be shared in the ARTstor Digital Library. The Collins Collection of Irish Political Cartoons consists of approximately 70 images relating to the political history of Ireland from the late 19th century to the early 20th century; Portraits of Actors, 1720-1920 features nearly 3,500 images of actors and actresses, including studio portraits, images of actors in costume, and illustrations of actors in performance; and the Motley Collection of Theater and Costume Design consists of approximately 5,300 individual items relating to more than 150 stage productions designed by the Motley Group between 1932 and 1976, including costume and set designs, sketches, notes, photographs, prop lists, storyboards, and swatches of fabric. The University Library will also share its Built Environment Collection, approximately 250 images of primary source materials related to the development of the campus of the University of Illinois at Urbana-Champaign.