Howz

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. If in a sahn of a mosque, it is used for performing ablutions. A howz is usually around 30 centimetres (12 in) deep. It may be used as a "theatre" for people to sit on all sides of the pool while others entertain.

Howz is a feature of the Persian gardens.

Small howz in Isfahan

A howz in the historical bath house of Arg of Karim Khan

Howz in Soltan Amir Ahmad Bath House, Kashan, Iran

A howz in an historical underground teahouse (chaikhaneh) in Yazd

Howz of the Eram Garden

The howz in courtyard of Mostowfi House

A big rectangular howz in a traditional Iranian house

Howz of the Khaneh Lari, Yazd

An asymmetrical empty howz

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Wikipedia