Archaeologists have spent more than a decade at two city blocks within a non-elite district in the Roman city of Pompeii, which was buried under a volcano in 79 AD.
The excavations are uncovering the earlier use of buildings that would have dated back to the 6th century.
Steven Ellis from the University of Cincinnati said the excavation is producing a complete archaeological analysis of homes, shops and businesses at a forgotten area inside one of the busiest gates of Pompeii, the Porta Stabia.
Ellis said among the discoveries in the drains was an abundance of the remains of fully-processed foods, especially grains.
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Waste from neighbouring drains would also turn up less of a variety of foods, revealing a socioeconomic distinction between neighbours.
A drain from a central property revealed a richer variety of foods as well as imports from outside Italy, such as shellfish, sea urchin and even delicacies including the butchered leg joint of a giraffe.
"That the bone represents the height of exotic food is underscored by the fact that this is thought to be the only giraffe bone ever recorded from an archaeological excavation in Roman Italy," said Ellis.
Deposits also included exotic and imported spices, some from as far away as Indonesia.