a Greek or Roman house (domus), designed to carry away the rainwater falling from the compluvium of the roof. It is usually made of marble and placed about 30 cm below the floor of the atrium, and emptied into a subfloor cistern.

Construction and use

Inspection (without excavation) of impluvia in Paestum, Pompeii and Rome indicated that the pavement surface in the impluvia was porous, or that the non-porous stone tiles were separated by gaps significant enough

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