Minoretti was born in 1938 in Crevenna D’Erba near Como. He began his artistic career with the Fine Art Association of Como. In 1970 he had his first individual show at “Il Giorno” Galleria in Milan. He was part of the Biennale di S. Marino di Lupari from 1985 until 1990. In 1998 he showed at Arte Structura in Milan and in the “Biennale Internazionale d’Arte Contemporanea” in Milan. From 1988 until 1944 his work was shown at the “Salon Grands et Jeunes d’Aujourd’hui” in Paris, and at galleries in Paris. Since 1995 he has been part of MADI Italia” and shown with this group in many exhibitions. His works are in public and private collections in Italy, the United States, France, Switzerland, Argentina, Hungary, and also at the “Mondrian House” in Holland.