Italian painter, primarily of landscape but also of still-life. He was born at Busto Arsizio and worked mainly in nearby Milan. Tosi has been called a ‘natural’ or ‘instinctive’ painter and his work shows a spontaneous feeling for the poetical interpretation of nature uncomplicated by intellectual theories. His early work was in the Impressionist tradition. Later he was influenced by Cézanne and his handling became somewhat Expressionist, but his work retained its freshness and spontaneity. He was an eminent figure in his lifetime: in the catalogue of the exhibition ‘Twentieth-Century Italian Art’ held at the Museum of Modern Art, New York, in 1936 he was referred to as ‘the dean of living Italian painters’. However, his reputation has declined since his death.