An archaeologist found a "vampire grave" in Bulgaria where a Medieval skeleton lies with an iron spike through its chest.
From The Telegraph:
"We have no doubts that once again we're seeing an anti-vampire ritual being carried out," said Professor (Nikolai) Ovcharov. He explained that the metal was driven through the corpse to stop a "bad" person from rising from the dead and terrorising the living.
"Often they were applied to people who had died in unusual circumstances – such as suicide."
'Vampire grave' found in Bulgaria (Thanks, Bob Pescovitz!)