The WDL makes it possible to discover, study, and enjoy cultural treasures from around the world on one site, in a variety of ways. manuscripts, maps, rare books, musical scores, recordings, films, prints, photographs, and architectural drawings. by place, time, topic, type of item, and contributing institution. search. interactive geographic clusters, a timeline. The WDL was developed by a team at the U.S. Library of Congress, with contributions by partner institutions in many countries; the support of UNESCO.