Béla Bartók was a Hungarian composer and ethnomusicologist, born on March 25, 1881, and died on September 26, 1945. He is known for his contributions to 20th-century classical music, blending folk elements with classical forms. Bartók's works often feature complex rhythms and innovative harmonies, making him a key figure in modern music. In addition to composing, Bartók collected and studied folk music from various regions, particularly in Hungary and Transylvania. His research helped preserve traditional music and influenced his own compositions. Notable works include the Concerto for Orchestra and the Music for Strings, Percussion, and Celesta.