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Victims of one of Italy’s largest World War II massacres were remembered on Monday as a former SS captain, who was sentenced to life in prison for his role in the attack, turned 100.

In 1944, Erich Priebke checked off a list of names as he and other Nazi soldiers gunned down 335 people at the Ardeatine caves in Rome. The massacre was ordered from Berlin as a response to a partisan attack on Nazi soldiers, The Guardian reports.

Priebke is now under house arrest in Rome, but is allowed to go outside for everyday tasks, such as eating or shopping for groceries.

Activists gathered in Rome Monday at a branch of the Left Ecology Freedom party to read the names of the victims.

"We cannot allow or accept that a man sentenced to life for war crimes and for the shameful massacre at the Fosse Ardeatine behaves as if all has been forgotten. None of us has forgotten," said Marta Bonafoni, a regional councilor for the Lazio region, according to the Guardian.

The Cantiere Democratico movement also delivered an open letter to Priebke’s home with a list of the victims, the youngest of which was 15 years old.

Click for more from The Guardian.