Gion Antoni Derungs (06/09/1935 - 04/09/2012), a Swiss composer, born in Vella (Graubünden). He had his first piano and organ lessons in the years 1949/1955 from Giusep Hounder of Disentis, later on from the Hard uncle Sialm of Coira (brother of the mother), one of the most significant composers, that had studied at the Conservatorio of Geneva. He attended the Conservatory and the superior School of music of Zurich where he studied piano, organ, teaching of the song, direction of orchestra and reading of the score and achieves different diplomas with Paul Müller, Hans Andreae, Luigi Favini and other. From 1960 to 1962 he was director of music at Lichtensteig/Toggenburg where he met his future wife. In 1962 he signed at the Seminar Cantonale for teachers of Coira and he became organist of the Cathedral of the same town. From 1962 to 1969 he was director of the choruses Mountain retoromanci and Rezia of Coira and in 1971 he founded the Quartet grischun, an unanimous formation that performs above all sets to contemporary music. In 1970 he received the Mencion Honorifica from the international Competition of composition for symphonic music Oscar Espla of Alicante (Spain) for its work Rorate op. 23 for two mixed choruses and orchestra. In 1981 his Missa pro defunctis has been rewarded with a medal of gold to the international Competition of Ibagué (Colombia). A very important event in his artistic life took place in May 1986: The cerchel magic that is not only its first lyric work, but also the first melodranna in retoromancio. In 1995 he finished his Symphony V for large orchestra and organ op. 140.