The Library of Congress is a research library that officially serves the US Congress and is the de facto national library of the United States. It is the oldest federal cultural institution in the United States. The library is located in three buildings on Capittle Hill in Washington, D.C.; it also supports the National Center for Audiovisual Conservation in Culpepper. The library is overseen by the librarian of Congress, and its buildings are maintained by the Capitol architect. The Library of Congress claims to be the largest library in the world. Its “collections are universal, not limited to subject matter, format or national boundaries, and include research material from all parts of the world and in more than 450 languages.” A special section of the Library of Congress handles copyright (copyright) processing. You can apply for copyright online by filling out the required form on the Library of Congress website.