A wind catcher in Yazd, nicely lit at night.
Central Iran has a very large day-night temperature difference, ranging from very cold to extremely hot, and the air tends to be very dry all day long. Most buildings are constructed of very thick ceramics with extremely high insulation values. Furthermore, towns centered on desert oases tend to be packed very closely together with high walls and ceilings relative to Western architecture, maximizing shade at ground level. The heat of direct sunlight is minimized with small windows that do not face the sun. Therefore, wind catcher was invented to ventilate the house. Wind catcher (Baadgir in Persian) is a traditional Persian architectural device used for many centuries to create natural ventilation in buildings.