The BBC has a nifty slide show documenting the very cool hi-tech cleaning of the Parthenon Marbles in Athens, which has removed decades of pollution.

parthenon marbles

Since the damage to the Athenian reliefs turned out to be less severe than previously thought, the cleaning has fueled the debate over whether the rest of the marbles, (in)famously known as the “Elgin Marbles” and on display in the British Museum, should be repatriated to Athens and installed in the New Acropolis Museum.