The screens used in this period served as protection, at ground floor, brise soleils, or devices for controlling exposure and over- looking. They would be made of stone, cement, factory made perforated units, brick, ironwork, and special ceramic units in various colours, especially white, brown, mustard, green, and turquoise. The resulting surfaces helped the architecture a great deal, in particular because of their eastern origins. The variedly diffracted light that passed through would transform the other surfaces that it fell on. In the summer, a cool ambience would be created in the interiors, as well as a feeling of cosi- ness and separation from the outside world. Screens can be useful architecturally in the future, especially when we consider how ugly windows have become.