In traditional Persian architecture, a howz (Persian: حوض) is a centrally positioned symmetrical axis pool.
If in a traditional house or private courtyard, it is used for bathing, aesthetics or both.
[1][2] If in a sahn of a mosque, it is used for performing ablutions.
It may be used as a "theatre" for people to sit on all sides of the pool while others entertain.
[3] Howz is a feature of the Persian gardens.