This fine site was created by the Library of Congress to complement an in-situ exhibit of collected items related to the world of opera. The exhibit was also meant to commemorate the bicentennials of composers Giuseppe Verdi and Richard Wagner, both born in 1813. With sections featuring Richard Wagner and German Opera, Giuseppe Verdi and Italian Opera, and Beyond Verdi and Wagner, the collection...

Founded in 1986, PD Info (taken over in early 1999 by Haven Sound, Inc.) provides information and resources for identifying public domain materials. As part of that project, this site has been developed to help users understand what music they can freely use and how they may use it. As the site explains, the rules for public domain use are not as clear-cut as they seem, and users will find a...