Music history, sometimes called historical musicology, is the highly diverse subfield of the broader discipline of musicology that studies music from a historical viewpoint. In theory, "music history" could refer to the study of the history of any type or genre of music (e.g., the history of Indian music or the history of rock). In practice, these research topics are often categorized as part of ethnomusicology or cultural studies, whether or not they are ethnographically based. The terms "music history" and "historical musicology" usually refer to the history of the notated music of Western elites, sometimes called "art music" (by analogy to art history, which tends to focus on elite art).