Global warming could also deprive Italy of 10 other cultural treasures including Venice and its lagoon, the towns clinging to cliffs that make up the Cinque Terre and the Amalfi coast.
Also at risk are Pisa’s Piazza del Duomo and the historic centre of Naples
That's the conclusion of a new study looking at the potential loss of world heritage worldwide through global warming.
Using sea level rise estimates and topographic data, the researchers looked at the impact of rising sea levels in different countries over the next 2,000 years.
"In this time scale, ocean heat content and glacier ice mass can be considered to be in equilibrium with global temperatures, and relatively independent of the warming path of the initial 100 years," the Germany and Austria-based study authors said.
They found 40 Unesco sites worldwide would be affected by rising oceans over the next 2,000 years if global warming continued at the same rate.
But they found that a "not improbable" three-degree Celsius rise in temperature over the same period would have an even more serious impact, affecting 136 Unesco sites worldwide.
The researchers in the study published in the journal IOP science recognized the difficulty of making models of climate change, and also admitted they hadn't taken into account local conditions like flooding.
But they said the consequences of inaction could be disastrous.
"Our analysis illustrates that the spatial distribution of the existing and potential future cultural world heritage makes it vulnerable to sea-level rise," the study authors wrote.
"Future generations will face either loss of these sites, or considerable efforts to protect them," they warned.