Roberto Abraham Scaruffi

Ai Weiwei, paint ejaculations and prehistoric farts – the week in art The Chinese artist installs a show in Yorkshire via email because his passport has been confiscated. Plus Richard Jackson's paint-splatter machines, Kenneth Clark, and the boy that pees LEDs – all in your top weekly dispatch Jonathan Jones theguardian.com, Friday 23 May 2014 06.56 EDT Jump to comments (…) A riot of kitsch … detail of Richard Jackson's Pain-t. Photograph: Tristan Fewings/Getty for Hauser & Wirth Exhibition of the week Richard Jackson Paint machines, mechanical toys, kitsch sculpture and wild ejaculations of squidgy, oily, arty colours all over the place are the frolicsome style of this subversive Los Angeles-based painter. Jackson turns painting into clowning. This exhibition should be a riot. • Hauser and Wirth, London W1S until 26 July Other exhibitions this week Anna Bunting Branch This feminist artist uses painting, video and words to question history and representations of women in art. Her new project concerns the 17th-century utopian writer Margaret Cavendish. • Jerwood Project Space, London SE1 until 30 August La Grande Guerre This show looks at the first world war, on the 100th anniversary of its outbreak, through French eyes, focusing on prints that reported on its first seven violent months when Europe entered a new age of warfare totally unprepared. • Fitzwilliam Museum, Cambridge CB2 until 28 September Richard Deacon and Bill Woodrow Collaborative new works in glass by two of Britain's best-known sculptors. • New Art Centre, Salisbury SP5 from 31 May until 6 July Sean Lynch In this "blow-by-blow account of stone carving in Oxford", Lynch cannibalises art from the era of Ruskin for a historical installation. • Modern Art Oxford, Oxford OX1 until 8 June Masterpiece of the week Just an innocent young peasant lad … Velázquez's portrait of Saint John the Evangelist. Photograph: The National Gallery Diego Velázquez – Saint John the Evangelist on the Isle of Patmos (1618) The Book of Revelation has been illustrated in terrifying ways by artists – most notably Albrecht Dürer – but the great realist painter Velázquez concentrates on its author, the figure of Saint John the Evangelist himself, as he sits writing this prophetic book. The visionary describing the last days is just an innocent young peasant lad in this painting, who transcribes the divine truth in a break from his labours. • National Gallery, London WC2N Image of the week To die for ... video artist Bill Viola's Martyrs installation at St Paul's Cathedral in London What we learned this week That Ai Weiwei has filled a chapel in Yorkshire with symbols of his persecution – via email (his passport has been confiscated by Chinese authorities) That photographer Michael Schmidt has spent seven years in slaughterhouses and factory farms exposing what we really eat – and has won the Prix Pictet for it And why his work proves that our guilt about consumption is now all-consuming That a pastor in Florida has been jailed for trying to flog fake Damien Hirsts That Bill Viola's new Martyrs altarpieces at St Paul's – videoworks of people being strung up, engulfed in flames and doused in water – is to die for That a Museum of Water, which has bottled the whole of human life – from spit to snowballs to liquid grief – is about to open Who the top 10 goddesses in art are That corporate designs like the new McDonald's mascot can be the most terrifying objects ever That Tate has turned Kenneth Clark into a prehistoric old fart Whether British folk art includes your nan's knitting Which female artists time forgot What the best Latin American photography ever is That boys peeing LEDS and women blinking inside artworks can only mean one thing ... Julian Opie is back That Wim Wenders has made a film about Sebastião Salgado