A display device (1) for displaying a decorative object (2), including a case (4) provided with a support element (5) on which an area of interest (3) is defined, inside which the decorative object (2) is likely to be disposed and/or handled. A processing unit generates a command for controlling the illumination properties of a main illumination device (8a) and/or of a secondary illumination device (8b) as a function of criteria concerning the viewer's visual perception of the object (3) and controls the main illumination device (8a) and/or the secondary illumination device (8b) as a function of the command for controlling the properties of the illumination devices (8a, 8b).