Gunnar Berg
Born: 11th January 1909, Switzerland
Died: 25th August 1989, Switzerland
Nationality: Danish
Gunnar Berg was a Swiss-born Danish composer. A leading exponent of serialism in Denmark, he is considered to have written the first Danish serial piece, his Cosmogonie for two pianos, in 1952.
Berg was born to Danish and Swedish parents in Switzerland. He studied with Herman David Koppel from 1938 to 1943, and moved to Paris in 1948, where he became associated with Honegger and Messiaen. In 1952 he married the pianist Béatrice Duffour, who would later record much of his piano music. In the same year he became the first Dane to attend the summer courses at Darmstadt.
Read more at https://en.wikipedia.org/wiki/Gunnar_Berg_(composer)