Anton Diabelli (1781–1858) was an Austrian composer, music publisher, and pianist, best known for his contributions to the classical music genre, particularly in the early Romantic period. He is most famous for his waltz "Sonatina in C Major, Op. 168," which became the basis for Ludwig van Beethoven's "Diabelli Variations," Op. 120, a cornerstone of piano repertoire that showcases variations and creativity. Diabelli's impact on music extended beyond his compositions; he was a significant figure in music publishing, founding the publishing house Diabelli & Co. in 1817. This company published works by prominent composers of the time, including Schubert and Liszt, thereby influencing the dissemination of music in the 19th century. As a composer, Diabelli's works often reflected the transition from Classical to Romantic styles, characterized by lyrical melodies and expressive harmonies. His contributions to piano music and his role as a facilitator for other composers solidified his place in music history, though he is often overshadowed by the giants of his time. Overall, Diabelli's legacy lies in both his compositions and his pivotal role in the music publishing industry.