This is a very good example of the embryonic use of linear or monofocal perspective: a vanishing point on which the gaze of the viewer, motionless in front of the composition, converges. The ordering of the forms and the size of the objects and figures on a plane surface create an illusion of depth and give the scene a sense of verisimilitude. In the Annunciation, the chessboard pattern of the paving enhances the effectiveness of visual perception.