The Black Abbot (novel)

The Black Abbot is a crime novel by the British writer Edgar Wallace which was first published in 1926 about the ghost of an abbot haunting the grounds of an old abbey and protecting a lost treasure.

The following year Wallace turned the story into a play The Terror which itself had several film adaptations.

Film adaptation
It was adapted in 1963 by the German studio Rialto Film as The Black Abbot as part of a long-running series of Wallace adaptations made by the company.