Ulenspiegel, Op. 23, is a German-language opera in three acts by Walter Braunfels to a libretto by the composer after Charles De Coster's The Legend of Thyl Ulenspiegel and Lamme Goedzak. It premiered in Stuttgart's Hoftheater on 4 November 1913.
Braunfels' work was considered degenerate music and banned during the Nazi era, and the first revival of Ulenspiegel took place 28 January 2011 in Gera. The scenery for this production was designed by architect Stephan Braunfels, the grandson of Walter Braunfels.