Symphony No. 1 in C minor is a classical music composition by Gustav Mahler, completed in 1888. It is often referred to as the "Titan" symphony, reflecting its grand scale and emotional depth. The work consists of five movements, showcasing Mahler's innovative orchestration and thematic development. The symphony begins with a somber introduction, leading into lively and contrasting sections. It incorporates various musical styles, including folk melodies and dramatic motifs. Mahler's first symphony is notable for its exploration of nature, life, and the human experience, making it a significant piece in the symphonic repertoire.