 The epic took form in the 10th century and reached its final form by the 14th century; the number and type of tales have varied from one manuscript to another.All Arabian fantasy tales were often called "Arabian Nights" when translated into English, regardless of whether they appeared in "The Book of One Thousand and One Nights", in any version, and a number of tales are known in Europe as "Arabian Nights" despite existing in no Arabic manuscript.This epic has been influential in the West since it was translated in the 18th century, first by Antoine Galland.