What is the setting of The Wolf and the Dove by Kathleen E. Woodiwiss?

The story is set in England, beginning in 1066. The background for the story - William's invasion of England and the role of knights as invaders - are real. Details such as William's nickname, the Conqueror, are historically correct, lending credence to the story. Wulfgar is not mentioned in history in connection with William's rise to the throne, which is acceptable in the novel. The fact that the background is true is sufficient.