Gassenhauer nach Hans Neusiedler (1536), commonly known as Gassenhauer (pronounced [ˈɡasn̩ˌhaʊ̯ɐ]), is a short piece from Carl Orff's Schulwerk. As the full title indicates, it is an arrangement of a much older work by the lutenist Hans Neusidler from 1536. It (along with several other pieces) is in fact credited to Orff's longtime collaborator, Gunild Keetman, on at least one recent release of the Schulwerk. As with many other pieces from the Schulwerk, it has been used multiple times on television, radio, music, and in films, including the films Badlands (1973), True Romance (1993) (cover version by Hans Zimmer), Ratcatcher (1999), Finding Forrester (2000), Monster (2003), Michael Moore's Capitalism: A Love Story (2009), The Simpsons′ 22nd-season episode "The Scorpion's Tale" (2011), and The Simpsons′ 33rd-season episode "Mothers and Other Strangers" (2021). The piece was used as the theme music for an afternoon radio program also titled Gassenhauer on the classical music station WCLV in Cleveland, Ohio, in the 1970s.
- The title is a colloquial archaic German word originally meaning lively pieces of dance music, and later used for popular songs like operetta schlager during the early record era.
- "Orff-Schulwerk, Volume 1: Musica Poetica, Celestial Harmonies 13104-2".
- Francis, Mark (2010). "Street Song / Gassenhauer: A 500 Year History" (PDF). Evergreen American Orff-Schulwerk Association Chapter Newsletter. 34 (1): 3. Archived from the original (PDF) on November 13, 2013. Retrieved June 6, 2013.