<Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The history of pizza begins in antiquity, when various ancient cultures produced flatbreads with toppings . </P> <P> The precursor of pizza was probably the focaccia, a flat bread known to the Romans as panis focacius, to which toppings were then added . Modern pizza developed in Naples, when tomato was added to the focaccia in the late 18th century . </P> <P> The word pizza was first documented in AD 997 in Gaeta and successively in different parts of Central and Southern Italy . Pizza was mainly eaten in the country of Italy and by emigrants from there . This changed after World War II, when Allied troops stationed in Italy came to enjoy pizza along with other Italian foods . </P>

What popular food is thought to have originated in naples italy