The British Museum marked the 250th anniversary of its foundation this year, with an exhibition, The Museum of the Mind: art and memory in world cultures. We asked four archaeologists to review the show: Barry Cunliffe, professor at Oxford University and a trustee of the Museum; Colin Renfrew, professor at Cambridge University and former trustee; Chris Godsen, curator at the Pitt-Rivers Museum, Oxford University and Helen Geake, formerly at Norwich Castle Museum and now working on the British government's portable Antiquities scheme for England and Wales. Here is what they say.