What is the connection between a representation, such as a painting, statue or engraving, and its subject? For example, what makes a painting a painting of McX? The problem is not how to paint McX, which belongs to art experts. So the answer is not, for example, ‘The painter starts at the top with an egg-shape for the head …” The question is rather: what makes the results of such efforts a painting of McX? What conditions must a painting satisfy to warrant such a description? What is the force or meaning of the word ‘of’ in phrases like ‘painting of McX’?