Mind, by its own nature tends to divide the appearance of reality into pairs of opposites such as that of interior and exterior. We are used to considering the internal truth of the individual as different and separate from the external world and in the same way the image of the house, the imagine of an interior, is separate from the exterior. The elements that link those two parts are doors and windows.

«Eulogy of rhetoric» , in Italian « Elogio della dialettica » is a trompe-l’oeil in which a window inside the palace overlooks the palace itself.