Johannes Brahms was a German composer and pianist of the Romantic period. He is known for his mastery of classical forms and his rich harmonic language. Brahms' compositions include symphonies, chamber music, piano music, and choral works. His music is characterized by its emotional depth, complexity, and craftsmanship. Brahms' most famous works include his Symphony No. 4, his 'German Requiem,' and his piano concerto No. 2.