Twenty years after the last exhibition of his work, MASI Lugano is dedicating an extensive retrospective and publication to Richard Paul Lohse. This ambitious project underlines the importance of Lohse's work and the central position he occupies in the international art world with his painting and graphic art. With a selection of more than forty paintings from the four key decades of his artistic career, from the 1940s until his death, the authors shed light on fundamental elements of his rigorous methodical approach as well as historical events, social utopias and Lohse's confidence in the expressive power of color. Richard Paul Lohse (1902 Zurich–1988 Zurich) was a Swiss painter and graphic artist. He was one of the founders of systematic-constructive art in the 20th century.