Researchers studied garbage in the ancient city of Elusa.
The Longobards were a barbarian people who invaded and ruled over large parts of Italy for more than 200 years after the fall of Rome.
The coins could be worth millions of dollars.
The mosaic's multicolored patterns were painstakingly composed of tiny stones—about 3,000 of them per square foot.
"It's probably the single most important object that we found."
There may have been antimony lurking in the Roman town's water.
The study found that warming on this scale is "unprecedented" and the result of human influence.
There are many classical precedents for current anti-immigrant and anti-foreigner fervor.
Jesus's death on the cross, though a singular event for Christians, was just one example of the Roman Empire's many gruesome, grisly and public tools of torture.
The bust, funded by the Cossack community, will be mounted in St Petersburg in May.
As jihadis use cultural vandalism as a weapon of war, fears are increasing for the country's Greco-Roman heritage.