the.com/cistern

A patient underground hoarder turning sky into a private reservoir, no permission slip required.

means A large tank or reservoir, often underground, for storing water—especially rainwater or the water that feeds a flushing toilet.

from From Latin 'cisterna,' a water tank, built on 'cista,' a box or chest (the same root that gives us 'chest' and 'cist'). So a cistern is literally a 'big box for liquid'—the idea of a container quietly enlarged from holding your valuables to holding your water supply. It reached English through Old French 'cisterne' in the medieval period.

ancient tech
Used for water storage over 5,000 years ago
basilica cistern
Istanbul's holds 80,000 cubic meters underground
toilet name
The toilet tank is technically a cistern
medusa heads
Roman cisterns reused carved gorgons as column bases
rain harvest
Catches roof runoff before it ever touches ground
for instance

chester beatty cistern — underground water storage in dublin, ireland built in 1950s to supply the chester beatty library

pool of siloam cistern — ancient jerusalem water collection system fed by hezekiah's tunnel, dated to 8th century bce

montezuma castle cistern — cliff dwelling water storage at montezuma castle national monument in arizona, built by sinagua people circa 1100 ce

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