"Variations on a Theme by Paganini" is a notable composition by Polish composer Witold Lutosławski, written in 1941. The piece is structured as a set of variations based on a well-known theme from Niccolò Paganini's 24th Caprice for solo violin. Lutosławski's work is notable for its innovative use of variation form, blending elements of traditional classical music with modernist techniques.