Art brut is the grey area of art. Despite existing on the fringes of art, art brut has a definite influence on artistic movements, schools and trends while also proving to be a stimulus for transcending aesthetic barriers. The work presented at the "Art's grey area – The Time of Art Brut" exhibition persuaded viewers to rethink their conventional methods of perception and descend into the forgotten corridors of imagination. Works by 31 art brut artists were shown during the exhibition. Among these artists were some of the most distinguished of their kind, such as Maria Wnęk and Edmund Monsiel, but also those worthy of wider recognition.