The Brown Lady

Probably the most famous ghost picture of all time "The Brown Lady" taken in
1936 by photographers Captain Provand and Indre Shira while shooting for
Country Life magazine proports to show a ghost descending a staircase at
England's historic Raynham Hall, which is said to be haunted by Lady Dorothy
Walpole, who once lived at the Hall. She is known as The Brown Lady due to
reports of the spirit being seen wearing a brown brocade dress. She officially
died of smallpox, but rumors have it that she was pushed down the stairs by her
husband after learning of an affair. Her ghost has been spotted numerous times
since her death.

This photo is a classic, one of the first pics i saw when i was young that started my intreat in the paranormal.