Which famous poet treasured his copy of Homer, but could never learn Greek? What prompted diplomats to circulate a speech by Demosthenes - in Latin translation - when the Turks threatened to invade Europe? Why would enthusiastic Florentines crowd a lecture on the Roman Neoplatonist Plotinus, but underestimate the importance of Plato himself? Having all but disappeared during the Middle Ages, classical Greek would recover a position of importance...