Here are some of the most common Library of Congress subject headings (controlled vocabulary) for 19th-century music history, criticism, genres, and various other aspects to use for keyword or subject searches. Use the facets in the left sidebar and the sort options to refine the results by format, date, language, author, genres, and other options. Note: there is no subject search term "Romantic" (as in "Romantic Era"). Click on the links to browse all the library materials on the particular subject. Note that these subjects may have further subdivisions.