This article investigates how, since ancient times, building windows have had grids of stucco, stone, wood, or iron, as well as slabs of glass or other materials. They also appeared as simple apertures in the wall, the arrangement of which frequently served decorative functions. Following a classical tradition, the usage of shuttered windows with glass fixed on timber frames was known in late antiquity. The search for a peculiar architectural taste of the late antique and early mediaeval times is particularly appealing due to the light effects produced by shuttered windows made of translucent material, which provides a mystical and suggestive appearance.
 The light that transforms the decoration, using color combinations, sometimes occur in unexpected contexts or in an adjacent architectural form, such as the floor and vault of the royal apse in the bathroom of Khirbat al-Mafjar. The architectural element that includes the lozenges, closer to Khirbat al-Mafjar as a drawing and scheme, to create a particular visual effect, could be seen in three barriers of stucco windows found in situ in the windows of the central nave during the 1930 restorations to Bovino Cathedral. Presence of light during history and in various architectural oeuvres, in addition to functional aspect, as factor for illumination and life conferring to daily activities, it has been abundantly addressed from spiritual aspect and in doctrinal discussions of religions.