King Hezekiah is remembered for his achievement in digging a tunnel from the Pool of Siloam into the centre of the city of Jerusalem, so the city could have a fresh water supply, and therefore be better equipped to withstand a siege.
“The rest of the deeds of Hezekiah, all his power, how he made the pool and the conduit and brought water into the city …” (2 Kg 20:20)
This is a copy of the inscription found in Hezekiah's tunnel underneath the city of Jerusalem. The original is in the Istanbul Museum.
The inscription reads, "The tunnel is completed. This is the story of the tunnel. While the stone cutters were lifting up the pick, each toward his neighbour (from opposite ends) and while they were yet three cubits apart, there was heard a voice of one calling to another. And after that, pick struck against pick and waters flowed from the spring to the pool, 1200 cubits and 100 cubits was the height of rock above."
Israel Museum Link