One composer from this country composed the Peacock Variations and Dances of Galanta, and another composer from this nation composed Atmosphères and Lux Aeterna, two pieces included in 2001: A Space Odyssey. The former of those composers based an orchestral suite on his opera about a hussar who defeats Napoleon, Háry János. One composer from this country wrote a Concerto for Orchestra and Mikrokosmos, and Brahms composed a set of tunes based on dances from this nation. The primary Romantic composer from this country wrote the Transcendental Etudes and Rhapsodies from h
One composer from this country composed the Peacock Variations and Dances of Galanta, and another composer from this nation composed Atmosphères and Lux Aeterna, two pieces included in 2001: A Space Odyssey. The former of those composers based an orchestral suite on his opera about a hussar who defeats Napoleon, Háry János. One composer from this country wrote a Concerto for Orchestra and Mikrokosmos, and Brahms composed a set of tunes based on dances from this nation. The primary Romantic composer from this country wrote the Transcendental Etudes and Rhapsodies from here. For 10 points, name this country, home of Béla Bartók and Franz Liszt. 
One composer from this country composed the Peacock Variations and Dances of Galanta, and another composer from this nation composed Atmosphères and Lux Aeterna, two pieces included in 2001:
Republic of Hungary