Hydraulic Telegraph: World's First Telecommunications Device Was Invented in Ancient Greece - GreekReporter.com

Hydraulic Telegraph: Ancient Greece's Innovative Telecommunications Device

The hydraulic telegraph, invented by ancient Greeks, was a pioneering telecommunications device that enabled the sending of long-distance messages as early as the fourth century BC.

Designed by Aeneas Tacticus for military purposes, its primary function was to efficiently convey pre-arranged messages across Alexander the Great's vast empire.

The messages sent included alerts such as "Enemy on sight," "Cavalry attack," "We need wheat," "Infantry in action," and "Cyclical movement."

The operation of the hydraulic telegraph is detailed in Aeneas' work, Poliorcetika, as retrieved by Polybius.

This ancient innovation was utilized by the Greeks during times of war, showcasing their ingenuity in telecommunications.

Author's summary: Ancient Greece invented the world's first telecommunications device.

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Greek Reporter Greek Reporter — 2025-10-12

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