Rebecca Horn was born in Germany in the last years of World War II. Like Kiefer she was influenced by Joseph Beuys but it is Marcel Duchamp who seems to be most present in her machines and fabulous erotic installations, even in her strange and magical feature-length films. It was Duchamp who once...

Carl Andre nearly always works in a grid, with the dimensions of his finished works determined by multiples of a basic module – such as a brick, metal plate or house beam. The shape of each work depends entirely on the number and configuration of modules. The works are often laid out on the floor...

The son of artists Fred Klein and Marie Raymond, Yves Klein was baptised a Catholic and dedicated to Saint Rita, patron saint of lost causes, in the same year that Kasimir Malevich wrote ‘The painter is no longer bound to canvas, but can transfer his composition to space’.1 These coincidences...