Sergei Rachmaninoff was a Russian composer, pianist, and conductor who is widely considered one of the greatest composers of the Romantic era. He was born in 1873 and died in 1943. He composed a wide variety of works, including symphonies, operas, piano concertos, and chamber music. His most famous works include the Piano Concerto No. 2 in C minor and the Symphony No. 2 in E minor. He was also known for his virtuosic piano playing and conducting.