The Belgian ZERO artist Jef Verheyen (1932-1984) became known as the painter of light streams and colour spectra. He experimented not only with light, but also with movement and the invisible as means to evoke natural mechanisms and to reveal universal interrelationships between human beings and the surrounding world. He used geometric principles – his passion for geometry was born out of his interest in mathematics and (Greek) philosophy – as the basis for harmony. Verheyen never gave up on traditional media and materials such as the canvas, paint, and brushes to search for the essence of our nature. 

Piero Manzoni

°1933 †1963
Born in Milano,

[Piero Manzoni](http://www.pieromanzoni.org) (1933–1963, Italy) was a precocious painter and writer of manifestos, notably Per una pittura organica (‘Towards Organic Painting’) in 1957. Inspired by Klein and Fontana, Manzoni produces his first achrome (colourless painting) in 1957, underlining the purity of the material. From around 1960, when he exhibited with the Zero Group, his work focuses on the intellectual rather than the material. Manzoni produces certificates of authenticity declaring a person an authentic artwork, the artist’s breath caught in a balloon and his most legendary work, Merda d’artista (‘Artist’s Shit’): small metal cans containing 30 grams of his own excrement.