However, in April 2008 archaeological investigations revealed a late-18th century brick vault containing a single coffin.
It contained a wooden coffin and ointment vessels which left traces in the ground.
The walls were lined with niches, each of which contained a coffin.
During the fortification work, a party of knights entered the base of the monument and discovered the room containing a great coffin.
A body transfer is arranged but as the hearse makes its way from the morgue to the checkpoint, it is hijacked by Kreutzmann's men and replaced with another which contains a different coffin.
Each mound covered a single grave, containing a coffin made from a single split and hollowed oak tree.
The interior of the coffin appeared to have contained a partially collapsed wooden coffin.
The chamber of the tomb contained a lacquered wooden coffin which had burial goods placed around it.
Inside the pit was evidence of a wooden chamber 5 meters long, 3.5 m wide and 1.3 m high containing a lacquered wooden coffin that has since completely rotted away.
A second disturbed grave, also marked with a headstone, was found to the southeast and contained a coffin constructed with iron bolts.