Hockney

The lunatics were once in charge of the asylum. The first six directors of the National Gallery were all artists: before art history became an academic discipline, artists were the leading authorities on art. Founded more as a teaching resource than a visitor attraction, until the mid-1940s the gallery was reserved for artists two days a week, when other visitors had to pay for entry. This stopped them getting in the way of artists copying from the masters, an essential part of an art education in the days before cheap colour reproduction. There’s something of the altarpiece in this image of an artist’s progenitors flanking a touchstone for his art

‘Photography has arrived at a point where it is capable of liberating painting from all literature, from the anecdote, and even from the subject. So shouldn’t painters profit from their newly acquired liberty, and make use of it to do other things?’ argued Picasso. The inventor of cubism took advantage of his liberty in ‘Buste de Femme’ (1938) to turn Dora Maar into a precursor of Peppa Pig, flaring her nostrils to form a snout. Perhaps he wanted to teach a photographer a lesson about paint by rubbing her nose in it. Picasso didn’t abandon the subject or the anecdote. He was one of the first modern artists to turn