In 2003, the security team at England’s Hampton Court Palace noticed something strange on a closed circuit television screen – a mysterious figure with a startling pale face and long, black robes. Was it one of the many spirits said to haunt the sixteenth-century palace?

“We genuinely don’t know who it is or what it is,” Vikki Wood, a Hampton Court spokeswoman told MSNBC. “We’re baffled too — it’s not a joke, we haven’t manufactured it.”

Built in 1525, Hampton Court Palace has harbored kings, queens, and many other members of English royalty. Henry VIII’s third wife, Jane Seymor, died at Hampton Court while giving birth to the couple’s only son. Henry’s fifth wife, Catherine Howard, was imprisoned at the palace before being executed for adultery. Both women reportedly haunt the historic grounds.

Today, Hampton Court Palace is a popular tourist site, attracting thousands of visitors each year. Though a number of costumed performers roam the area, reps insist the figure captured on camera isn’t one of their own.

“We spoke to our costumed guides, but they don’t own a costume like that worn by the figure. It is actually quite unnerving,” said James Faukes, a palace security guard.

Guards saw the figure after someone, or something, opened the fire doors near the exhibition hall. The security team turned to the CCTV footage and spotted the eerie robed pictured above. The figure, who many refer to as Skeletor, hasn’t been seen since.