In 17th century France a group of nuns described some unsettling visitations at their convent, which developed into a story of possession, political intrigue, and a moment in time that was rife with social tensions.
Research:

Behind the Scenes Minis: Stairs and Trains
29:25

Elizabeth Blackwell's Curious Herbal
34:51

The Many Meanings of the Bunker Hill Monument
45:48