Thank the ancient Romans for 'street food'

Grabbing something hot and tasty on the move? You have the ancient Romans to thank. "Street food" was their invention, generally enjoyed with wine, gambling or even prostitutes.

Food on the go was an integral part of daily life in the empire, from nibbling on salted peas while watching gladiators battle in the Colosseum, to grabbing a sausage or fried fish snack after a dip in Rome's famed baths.

Feeding an empire of some 50 million people was no mean feat, as an exhibition in the Italian capital sets out to show in conjunction with Milan's 2015 Universal Exhibition on the themes of food and agriculture, running until the end of October.