Certain magic-users can make a painting of a door and then use it as portal to travel to another, similar painting. These magic doors are made in pairs, and can be any size, which could prove useful for thwarting large pursuers or, as actually demonstrated in the books, travel to areas which would normally be beyond their power to reach, such as an enchanted archway that behaves like an open door to some people and like a solid wall to others, or if one is too large to fit through the normal entrance, such as Florence and Simber did in the first book.