Invisible Art exhibition at the Hayward Gallery in London
An Invisible Art gallery - the first UK survey exhibition of artworks that explore ideas related to the invisible, the hidden and the unknown - hits London this summer.
The exhibition will emphasises the ideas behind artworks, the role of visitors' imagination in responding to art, the process of creating art.
The exhibition features works by some of the most important artists from the past half century including Andy Warhol, Yves Klein, Robert Barry, Chris Burden and Yoko Ono.
The exhibition runs from 12 June to 5 August at the Hayward Gallery.