- In 1981, he painted on assemblages of match boxes.
- In 1964, he began publishing his writings (e.g., the novel Belle que jamais, published in Strates, one of Dotremont's journals) while continuing his musical activities.
- In 1954 he made his first visit to the Internationale Ferienkurse für neue Musik at Darmstadt, where he met Karlheinz Stockhausen and Bruno Maderna.
- In 1971, he created the first of his ink-on-music-paper works and published sixteen lithographs, with the title "Muettes", in the Daily Bul. In the following year, he resumed painting in oils on paper and fabric, and exhibited at the Venice Biennale.
- He was a Belgian artist, composer, singer, actor, logogramist, and writer.
- His graphic and pictorial work is in the tradition of the plastic practice of writing which developed in Belgium. The rhythm of the elements, the musicality of their distribution in the appropriation of space, and extreme scriptuary fluidity of the symbols reveal the very personal contribution of this musician who painted and drew visual scores.
- His 1959 composition Quadrangles was performed on 24 January 1965 at the Wallraf-Richartz Museum in Cologne, in the concert series of the second Cologne Courses for New Music.
- Though he exhibited in 1949 as a member of Cobra, his first one-man show was mounted only in 1970 at the Dierickx gallery in Brussels. Subsequently, he exhibited many times in this city, where he lived in the working-class neighbourhood of Marolles.
- In 1957, he co-signed the "Manifesto against Style" with, amongst others, Serge Vandercam, Pierre Restany, Yves Klein, Roel d'Haese, and Pierre Alechinsky.
- Born in Mons, Calonne studied music from 1944 until 1946 at the conservatories of Mons and Brussels, with amongst others the composer André Souris, who introduced him to the surrealist movement. He then pursued a course of art studies at the Académie Royale des Beaux-Arts in Brussels from 1947 to 1949, when he attended La fin et les moyens (The End and the Means), the first Belgian exhibition of the COBRA group at the Palais des Beaux-Arts de Bruxelles, where he met Christian Dotremont.
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