Sergei Rachmaninoff (born March 20 [April 1, New Style], 1873, Oneg, near Semyonovo, Russia—died March 28, 1943, Beverly Hills, California, U.S.) was a composer who was the last great figure of the tradition of Russian Romanticism and a leading piano virtuoso of his time. He is especially known for his piano concerti and the piece for piano and orchestra titled Rhapsody on a Theme of Paganini (1934).

His fame and popularity, both as composer and concert pianist, were launched by two compositions: the Prelude in C-sharp Minor, played for the first time in public on September 26, 1892, and his Piano Concerto No. 2 in C Minor, which had its first performance in Moscow on October 27, 1901. The concerto, his first major success, revived his hopes after a trying period of inactivity.

Rachmaninoff’s music, although written mostly in the 20th century, remains firmly entrenched in the 19th-century musical idiom. He was, in effect, the final expression of the tradition embodied by Tchaikovsky—a melodist of Romantic dimensions still writing in an era of explosive change and experimentation.