A gladiator's helmet left behind in the ruins of Pompeii is the centrepiece of an exhibition to be unveiled in Melbourne today. The 2,000-year-old bronze helmet is one of 250 items brought together at the Melbourne Museum to illustrate life in the ancient city. Museum manager Brett Dunlop says the helmet survived the eruption of Mount Vesuvius and was recovered 200 years ago. 'A large number of gladiators' helmets and shin guards and shoulder guards were found in what was most likely a storeroom in the gymnasium area,' he said. 'Most definitely the gladiators who were able to would have...