This encyclopedia is the first major reference work focusing on music in twentieth century Portugal. In 4 volumes, it includes more than 1250 entries, 550 photographs, and thematic and name indexes. It covers classical, popular and traditional music, folklore, pop-rock, jazz, fado of both the Coimbra and Lisbon traditions, and music of migrant communities. It also addresses other expressive ways in which music plays a central role such as dance, film and theater. It encompasses the media that have had an impact on the musical domains under study, such as the publication of sheet music, the recording industry, radio and film.