1. - Nagyszentmiklos March 25, 1881–New York September 26, 1945) was a Hungarian composer and pianist, considered to be one of the greatest composers of the 20th century.
2. There is also a Post-Punk band from the 1980's that went by this name. Bartok was comprised of John Grant, Simon Werner, Jah Wobble, and Rat Scabies.
Krzysztof Penderecki (born November 23, 1933 in D?bica) is a Polish composer and conductor. His 1960 avant-garde Threnody to the Victims of Hiroshima for string orchestra brought him to international attention, and this success was followed by acclaim for his choral St. Luke Passion. Both these works exhibit novel compositional techniques. Since the 1970s Penderecki's style has changed to encompass a post-Romantic idiom.
Mauricio Kagel (born in Buenos Aires, December 24, 1931, died in Cologne, September 18, 2008) was an Argentine composer who has lived in Germany for most of his career. He was most famous for his interest in developing the theatrical side of musical performance. Many of his pieces give specific theatrical instructions to the performers, such as to adopt certain facial expressions while playing, to make their stage entrances in a particular way, to physically interact with other performers and so on.