Rondeau fantastique sur un thème espagnol: "El Contrabandista" ("Fantastic Rondo on the Spanish Theme The Smuggler"), S. 252, is a classical musical composition for piano solo by Franz Liszt, written in 1836, and published in 1837 as Liszt's Opus 5 No. 3. It is based on a Spanish song popular at that time. It lasts approximately 8–9 minutes according to the high tempo Liszt assigned, though most pianists play it slower (10–12 minutes) due to its incredible difficulty.