Along with folk music and popular music, art music is one of three principal categories in a contemporary taxonomy of music.[^1] While useful for identifying shared characteristics across diverse musical practices, these categories are not fixed or stable, but historically contingent. [^1]: Denise Von Glahn and Michael Broyles, “Art Music,” in _Grove Music Online_ (Oxford University Press, 2012), [https://doi.org/10.1093/gmo/9781561592630.article.A2227279](https://doi.org/10.1093/gmo/9781561592630.article.A2227279).