
1) Ancient Greek architecture
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https://www.crosswordclues.com/clue/impluvium

The impluvium is the sunken part of the atrium in a Greek or Roman house (domus). Designed to carry away the rainwater coming through the compluvium of the roof, it is usually made of marble and placed about 30 cm below the floor of the atrium. Inspection (without excavation) of impluvia in Paestum, Pompeii and Rome by an American civil engineer{w...
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http://en.wikipedia.org/wiki/Impluvium
[house] An impluvium is a type of dwelling typical of the Jola in the Casamance region of Senegal. It is a circular mud building, built with a ring of rooms around a walkway that circumscribes a central water trench, fed by an opening that allows water into the building. Impluvia remain cool in very hot weather as the water evaporates. Ther...
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http://en.wikipedia.org/wiki/Impluvium_(house)

• (n.) In Roman dwellings, a cistern or tank, set in the atrium or peristyle to recieve the water from the roof, by means of the compluvium; generally made ornamental with flowers and works of art around its birm.
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http://thinkexist.com/dictionary/meaning/impluvium/

(from the article `atrium`) ...the atrium held the altar to the family gods, the Lares. The atrium was designed either with or without columns; it had, universally, a marble ...
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http://www.britannica.com/eb/a-z/i/12

A term used for the ornamental pool in an atrium which collected rain-water coming through the compluvium - square opening - in the atrium roof. The overflow from the pool would be collected in large cisterns underneath the pool.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
Im·plu'vi·um noun [ Latin , from
impluere to rain into; prefix
im- in +
pluere to rain.]
(Architecture) In Roman dwellings, a cistern or tank, set in the atrium or peristyle to recieve the water from the roof, by means of the
compluvium ; generally made ornam...
Found on
http://www.encyclo.co.uk/webster/I/21

In Roman dwellings, an impluvium was a cistern or tank, set in the atrium or peristyle to receive the water from the roof, by means of the compluvium. They were generally made ornamental with flowers and works of art around the brim.
Found on
http://www.probertencyclopaedia.com/browse/TI.HTM

impluvium A rainwater tank in the atrium of an ancient Roman house.
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http://www.wordinfo.info/words/index/info/view_unit/1708/

(Latin) in a Roman house, a basin built into the floor of the atrium that collected rain from the compluvium, or quadrangular skylight towards which the roof sloped that served as a source of light and air.
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https://www.encyclo.co.uk/local/10135

a basin or tank within a compluvium.
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https://www.infoplease.com/dictionary/impluvium
No exact match found.