From May 1940 to November 1944, about 30,000 people, including disabled individuals, mental patients, prisoners, and laborers, were killed in gas chambers at Hartheim Castle and burned.
DNA tests confirm remains are of soldiers linked to modern Han and northern Chinese populations.
In addition to the seized stone from the megalithic grave, investigators discovered on the property of the convicted individual eight other stones arranged in a circle.
As archaeologists began excavations at the site, they unearthed at least 30 graves of infants and young children, including newborns, buried outside the church's sanctuary and in mass graves.
In the last few years, a new form of life has come to the cemetery. Young people stand in between the gravestones, chattering, laughing, and digging with shovels.