Henryk Stażewski created 'Relief 12' in 1968, painting colour spots in tempera on a sheet metal relief. The creator of the work is a classic of modernity, the most consistent representative of geometric abstraction in Polish art, rooted with his work in the ideas of interwar constructivism. In the second half of the 1950s, the artist introduced a new element into his artistic language - relief. This was the result of the logical evolution of the artist's search from the division of the plane and movement in the painting to spatial structures. Indeed, the grouping of similar elements made it possible to explore the correlation of shape and colour as well as order and chance in countless relations and variants.