u/Brandhack

the large open-air pool that is still filled every day by the natural hot spring that the Romans built the complex around (around 70 CE). The greenish water, surrounding colonnade, statues on the terrace, and the tower of Bath Abbey in the background make it one of the most recognisable Roman sites in Britain.

Source: Temple of Olympian Zeus, Athens - World History Encyclopedia

A jar of the type associated with fish-sauce production and branding, often marked with the producer’s name and quality claims.

Self-regulating gravity-fed systems with sluices, reservoirs, and overflow controls. They engineered cities to handle massive water distribution automatically, a physical "algorithm" for resource allocation.

Source: https://www.historyhit.com/locations/segovia-aqueduct/