Cele 7 'Cronici din Narnia' se pare ca sunt construite in jurul simbolisticilor celor 7 planete cunoscute in evul mediu:
The Lion, the Witch, and the Wardrobe-Jupiter
Prince Caspian -Marte
The Voyage of the Dawn Treader -Soare
The Silver Chair -Luna ,
The Horse and His Boy -Mercur
The Magician's Nephew -Venus
The Last Battle - Saturn.