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The world's largest library. View historic photos, maps, books and more. Contact experts for help with research. Plan a visit. Home of U.S. Copyright Office. The Library of Congress Homepage Featured Items Pause Previous Congress.gov Track bills on the official site for U.S. federal legislative information. Authors Announced for Sep. 6 National Book Festival More than 90 authors come to Washington to celebrate 25 years of uniting book lovers 1/5 Summer Movies on the Lawn Fun films in an open-air setting Thursday nights in July and August. 1/5 Library Acquires Stephen Sondheim Collection Collection includes music and lyrics for "Send in the Clowns," "Company," "Sweeney Todd," "Into the Woods" and more 1/5 Thursday Night Fun & Programs Live! at the Library features evening engagement in a gorgeous setting. 1/5 Congress.gov Track bills on the official site for U.S. federal legislative information. 1/5 Authors Announced for Sep. 6 National Book Festival More than 90 authors come to Washington to celebrate 25 years of uniting book lovers Summer Movies on the Lawn Fun films in an open-air setting Thursday nights in July and August. Library Acquir