Eupalinos

Eupalinos (Ancient Greek: Εὐπαλῖνος) or Eupalinus of Megara was an ancient Greek engineer who built the Tunnel of Eupalinos on Samos Island[1]: 27 [2] in the late 6th century BC[1]: 27 .

The tunnel 1,036 m (3,399 ft) long[citation needed] conveyed water from a spring near Mount Kastro through the mountain into the ancient city of Samos (modern Pythagoreio)[3]: 149 [1]: 27 .

And, while the main tunnel is horizontal, the trench gets progressively deeper with an average gradient of 0.4% and gets from 3.5 to 8.5 m (11 to 28 ft) deep[1]: 28 [3]: 150 .

On the bottom of the trench ran terracotta pipeline carrying the water[1]: 27 [3]: 149 .

Eupalinos is considered the first hydraulic engineer in history whose name has been passed down.