Béla Bartók (1881-1945) was a Hungarian composer, ethnomusicologist, and pianist, widely regarded as one of the most influential musicians of the 20th century. His work primarily falls within the genres of classical and folk music, as he is known for integrating folk elements into classical forms. Bartók's notable works include "Concerto for Orchestra," "Music for Strings, Percussion, and Celesta," and the operas "Bluebeard's Castle" and "The Miraculous Mandarin." Bartók was a pioneer in the study of Eastern European folk music, collecting and transcribing thousands of folk songs, which significantly informed his compositional style. His use of rhythm, dissonance, and form has had a lasting impact on contemporary classical music, influencing composers such as Igor Stravinsky and Arnold Schoenberg. Bartók’s contributions extend beyond composition; his research on folk music laid the groundwork for future ethnomusicological studies. His legacy continues to resonate in classical music education and performance, making him a central figure in 20th-century music history.