Aradia, or the Gospel of the Witches is a book written by the American writer, humourist, and folklorist Charles Godfrey Leland, and was originally published in 1899. The work contains what Leland believed to be the religious text in poetic form, of a group of pagan witches or strega from Tuscany, Italy. The book was very influential in the development of the contemporary Pagan religion of Wicca.