Philosopher and translator, critic and writer, art agent and encyclopaedist: Denis Diderot, born in Champagne in 1713, died in Paris in 1784, was one of the defining figures of the movement that went down in history as the European Age of Enlightenment. But what is the vanishing point of his multifarious œuvre, which is characterised by downright centrifugal dynamics – unlike the works of his contemporaries Voltaire and Rousseau, Schiller, Kant and Hume?