Almost every mosque and traditionally all houses and buildings in areas of the Arab World contain a courtyard known as a sahn (Arabic صحن), which are surrounded on all sides by rooms and sometimes an arcade. Sahns usually feature a centrally positioned pool known as a howz.
The Sahn, acts like an indoor garden, where the Women in the house can feel free to not wear the traditional Islamic outfit that is worn in public, and in the Streets. If a sahn is in a mosque, it is used for performing ablutions. If a sahn is in a traditional house or private courtyard, it is used for aesthetics and to cool the summer heat.