Window curtains have been used to accessories homes since civilizations. But they are not just decoration tools. They are utility furnishings, used to block light, sound, heat and cold and provide privacy to the homes, as well as the inhabitants. Traditionally there were three types of window curtains
Sash curtains that are supposed to filter the light coming in from the windows.
A draw curtain to completely block out the light.
Drapes which are considered to be only decorative window curtains.