Scientists and scholars Polish effects revealed the secret of "vampires graveyard" for more than five hundred years, and it includes the graves with headless skeletons.
In July of 2013, scientists open some ancient tombs that were found near the road in the city of Gliwice, in the "southern Poland", and found that 17 of the 44 bodies buried in the cemetery were decapitated, and put them skulls between the legs, hands, or on a shoulders.
The way in which the bodies were placed ritual medieval later practiced in Eastern Europe, the introduction of the so-called vampires after implementation.