UNOVIS was a short-lived but influential group of artists, founded and led by Kazimir Malevich at the Vitebsk Art School in 1919. So the poster is devoted to Malevich.
The concept of the poster:
Human life is life among forms, forms surround us, penetrate us, cover our eyes. "We must give forms life and the right to individual existence," said Malevich. We are inhabitants of the world of forms, we see them and exist with them in our symbiotic space.
