Béla Bartók was a Hungarian composer and ethnomusicologist, born on March 25, 1881, and died on September 26, 1945. He is known for his significant contributions to 20th-century classical music, blending folk elements with modern techniques. Bartók's works often feature complex rhythms and innovative harmonies, making him a key figure in the development of contemporary music. In addition to his compositions, Bartók was passionate about collecting and studying folk music from Hungary and other regions. His research helped preserve many traditional songs and influenced his own music. Notable works include the Concerto for Orchestra and the Music for Strings, Percussion, and Celesta.