Rued Immanuel Langgaard (1893–1952) was a Danish composer known for his unique contributions to early 20th-century classical music. His style blends elements of late Romanticism with modernist tendencies, often featuring expansive forms and innovative orchestration. Langgaard's music is characterized by its emotional depth, rich harmonic textures, and a sense of mystical spirituality. Notable works include his symphonies, particularly Symphony No. 1, which showcases his early Romantic influences, and Symphony No. 5, which reflects his later avant-garde style. Other significant compositions include the opera "Antichrist" and his numerous chamber works, choral pieces, and organ music. Despite being relatively obscure during his lifetime, Langgaard's music has gained recognition in recent decades, influencing contemporary composers and enriching the repertoire of Danish music. His unique voice and exploration of themes such as nature, eternity, and the cosmos have solidified his place in the canon of classical music. Today, Langgaard is celebrated for his originality and is considered one of Denmark's most important 20th-century composers, contributing to the evolution of modern classical music.