The Fox Sisters were three siblings, Margaret, Kate, and Leah, who gained fame in the 1840s for their role in the development of the spiritualist movement in the United States. They claimed to communicate with spirits through a series of mysterious knocks and raps, which they said were responses from the deceased. Their demonstrations attracted significant attention and led to the establishment of spiritualism as a popular belief system. The sisters' activities began in Hydesville, New York, where they lived in a house that was said to be haunted. Their claims sparked interest in the paranormal and inspired many others, including notable figures like Allan Kardec and Emma Hardinge Britten, to explore spiritualism further. Despite later admitting that their abilities were a hoax, the Fox Sisters left a lasting impact on American culture and the belief in the supernatural.