Julian Opie Cartoon portraits and radically simplified figures make for bold yet unexpectedly philosophical art. • Alan Cristea Gallery, London, until 16 June. The Philosophy Chamber An 18th-century cabinet of curiosities at Harvard University is re-created in an exhibition that looks at the history of collecting. • Hunterian, Glasgow, until 15 July. Fashioned from Nature A 19th-century Darwinian dress decorated with beetle wing-cases in black and white is one of the fascinating images of nature that have been shaped for the sake of fashion. • V&A, London, until 27 January. Charmed Lives in Greece The philhellenic friendship of Nikos Hadjikyriakos-Ghika, John Craxton and Patrick Leigh Fermor shows how a passion for Greece has inspired modern artists and writers. • British Museum, London, until 15 July. Masterpiece of the week |