| Timeline |
| 1928 |
Born 22 August in Mödrath near Cologne |
| 1947 |
Begins studies with Martin at the Cologne Musikhochschule |
| 1951 |
Marries Doris Andreae, has four children |
| 1952 |
In Paris, attended Olivier Messiaen’s courses in rhythmics and aesthetics. |
| 1958 |
Makes his first visit to the U.S. |
| 1963 |
Founder and artistic director of the Cologne Courses for New Music. |
| 1965 |
Guest professor of composition at the University of Pennsylvania |
| 1966 |
Guest professor at the University of California |
| 1967 |
1967 Marries Mary Bauermeister, they have two children |
| 1971 |
Appointed Professor of composition at the National Conservatory of Music in Cologne |
| 2001 |
Awarded the German Music Edition Prize in the category
of "Scores of Works of the 20th century" |
