Ora Caldera
The Ora Caldera is a Permian supervolcano in the Southern Alps of northern Italy. This  and  caldera was formed by a supereruption 277–274 million years ago that produced more than  of rhyodacitic-rhyolitic ignimbrite. The ignimbrite from this eruption forms the  Ora Formation, which represents the youngest eruptive unit of the Athesian Volcanic Group. See also
List of volcanoes in Italy

References

Calderas of Italy
VEI-8 volcanoes
Permian calderas