Despite her current marginal position, the nineteenth-century pianist and composer Delphine von Schauroth (1813–1887) once ranked among the most prominent virtuosos of the nineteenth century and had connections with Fanny Hensel, Ferdinand Hiller, Josephine Lang, Franz Liszt, Felix Mendelssohn, Robert Schumann and others. Drawing on large body of music criticism, as well as compositions, letters, images and literary works, this article presents a portrait of Schauroth as an artist, with an emphasis on the role of improvisation and the improvisatory in her pianism. In particular, the article fleshes out Robert Schumann's characterization of Schauroth as a ‘Corinna-sister’, a reference to the improvising poetess of Madame de Stäel's novel Corinne, or Italy. The article suggests that Schumann's comparison highlights key facets of Schauroth's status and character as a pianist and composer. Firstly, like Corinne, Schauroth was widely renowned as an eminent performer and was celebrated as a genius by critics, which was particularly notable for a woman musician in the early nineteenth century. Secondly, Schauroth was received as a creator, not only for her compositions, but also for her performances: in the late 1820s and early 1830s, in particular, critics responded to these performances with images of magical creation and an emphasis on the newness of her performance over the composer's work. Thirdly, Schauroth displayed a varied practice of improvisation, and her compositions were understood as having an improvisatory character.