An estimated 70 percent of the nearly 11,000 silent films produced in the US have been lost, according to a landmark study from the Library of Congress. The study, authored by historian and archivist David Pierce, finds that just 14 percent of all American silent films exist today in their original and complete format, while another 11 percent survive in complete form but in foreign language versions or formats of lower quality. The study was commissioned by the Librarys National Film Preservation Board, as part of a campaign to provide a more accurate inventory of the films that survive, and to facilitate efforts to preserve them. It is hoped that the study will spur other organizations to collaborate on the preservation and repatriation of silent films;