This is Marc Quinn’s most famous piece of work, Self, made using 4.5 litres of his own blood, which was slowly extracted from his body over a period of five months and frozen in a cast of his face. Quinn has been making these roughly every five years since 1991, and each one must be maintained carefully in fridges. The fragility of the media means exhibiting is difficult - the head has to be placed into a glass case which is chilled from underneath. It reminds the audience of the fragility of existence and the precise conditions necessary for the flourishing of life