Sergei Rachmaninoff was a Russian composer, pianist, and conductor who lived from 1873 to 1943. He is widely regarded as one of the greatest pianists of the 20th century and is particularly known for his virtuosic piano compositions. Rachmaninoff's music is characterized by lush harmonies, expressive melodies, and a strong sense of Russian romanticism. Some of his most famous works include his Piano Concerto No. 2, Rhapsody on a Theme of Paganini, and his Symphony No. 2. Rachmaninoff's music continues to be widely performed and admired around the world.