 There is also a collection of rare and out-of-print periodicals and more than half million articles.A separate audio-visual research library has more than 11,000 audio and videocassettes, slides, and films, which contain lectures and documentary material related to the Center’s various activities and interests.As part of the Foundation’s contribution to preserving Islamic culture and highlighting the contributions made by Muslim and Arab scholars, The King Faisal Center for Research and Islamic Studies has undertaken the challenging mission of locating, authenticating, acquiring, or copying, and indexing all known Islamic manuscripts worldwide.