Although we are not anywhere near London, it still catches our attention when we see giant names such as Ai Wei Wei and Richard Long - who will both be on show in Lisson Gallery later in the year. Ai Wei Wei, is a Chinese conceptual artist who is openly critical of his government's human rights agenda was famously detained in 2011. Long is an English photographer, painter and one of the most well known land artists. * The exhibition will run from 23 May – 12 July at Lisson Gallery in London Muddy Water Circle by Richard Long (1994). Photo James Wainman. Courtesy Lisson Gallery