How many levels are in Assassins Creed

Because of the nature of the game, it can't be divided into levels. It's a Sandbox, meaning you can go anywhere and do anything, almost in any order you want. Therefore, the term 'levels' cannot be used, as the format is too free. If it was a linear game with only one path between the beginning and end, then levels would be relevant. However, with this game, it isn't.