How old is Wiccanism?
Wicca
It was developed in England during the first half of the 20th century and was introduced to the public in 1954 by Gerald Gardner, a retired British civil servant
Wicca (English:  /ˈwɪkə/), also termed Pagan Witchcraft, is a contemporary Pagan new religious movement. It was developed in England during the first half of the 20th century and was introduced to the public in 1954 by Gerald Gardner, a retired British civil servant. Wicca draws upon a diverse set of ancient pagan and 20th-century hermetic motifs for its theological structure and ritual practices.