Launched in May 2014, the Art Discovery Group Catalogue (ADGC) offers an art-focused research experience within the OCLC WorldCat environment. Researchers may search within this specialized subset of Worldcat data to hone in on a vast trove of art-historical literature held in an ever-increasing number of the world’s finest art libraries. These art library records are searchable alongside additional content from a multitude of sources in the large metadata pool derived from thousands of commercial and freely-accessible collections, portals and repositories provided by OCLC as the WorldCat Central Index.