Concept

Hezekiahs Tunnel and Siloam Inscription

Intro

In 701 BC, the Assyrian king Sennacherib was marching on Jerusalem. Hezekiah, king of Judah, knew the city would not survive a long siege without a secure water supply. He sent two teams of stonecutters to work from opposite ends of a tunnel through solid rock, hoping they would meet in the middle. They did, and they cut a 1,750-foot S-shaped channel that carried water from the Gihon Spring outside the city walls to the Pool of Siloam inside the walls. You can walk through that tunnel today.

Inside the tunnel, near the meeting point, the workmen carved an inscription describing the breakthrough. The text was discovered in 1880 by a local boy wading in the water and reported to the German archaeologist Hermann Guthe. The inscription is the longest monumental Hebrew text from the period of the Judahite monarchy, and it confirms 2 Kings 20:20 and 2 Chronicles 32:30 in a remarkably direct way: the tunnel exists; it matches the biblical description; and the workmen's own report survives in their own hand.

In full

Hezekiah's Tunnel (the Siloam Tunnel) is a 533-meter S-shaped rock-cut water conduit running from the Gihon Spring on the eastern slope of the City of David to the Pool of Siloam at the southern end of the original city. Dated by radiometric and stratigraphic methods to the late 8th century BC, the tunnel matches the biblical description of Hezekiah's water works (2 Kings 20.20; 2 Chronicles 32.30). The Siloam Inscription, discovered in 1880, is a six-line monumental paleo-Hebrew inscription cut into the tunnel wall describing the moment the two teams of stonecutters working from opposite ends met in the middle. Currently the inscription is housed at the Istanbul Archaeology Museum (removed by Ottoman authorities in 1890); the tunnel is open to the public in Jerusalem.

Discovery

The tunnel was rediscovered by Edward Robinson in 1838 and surveyed extensively by Charles Warren in 1867. The Siloam Inscription was found in 1880 by a Jewish boy, Jacob Eliyahu, while wading in the tunnel; he reported it to his teacher Conrad Schick, who passed it to the German Palestine Society. The inscription was cut out of the tunnel wall by antiquities dealers in 1890 and transported to Constantinople, where it remains in the Istanbul Archaeology Museum. The tunnel itself was excavated and dated definitively in 2003 by Amos Frumkin and Aryeh Shimron using radiometric dating of organic material in the tunnel plaster, confirming the late-8th-century BC date.

What it shows

Three confirmations:

The tunnel matches the biblical description. 2 Kings 20.20: "Now the rest of the acts of Hezekiah, and all his might, and how he made the pool and the conduit, and brought water into the city, are they not written in the book of the chronicles of the kings of Judah?" 2 Chronicles 32.30: "This same Hezekiah also stopped the upper outlet of the waters of Gihon, and brought them down to the west side of the city of David." The 533-meter tunnel from Gihon to Siloam, cut through solid rock under siege conditions, matches both passages exactly.
The Siloam Inscription confirms the date and engineering method. The inscription reads (in part): "And this was the manner of the boring through: while [the diggers were still working with] their picks, each toward his fellow, and while there were still three cubits to be cut through, [there was heard] the voice of a man calling to his fellow... and the diggers struck through, each to meet the other, pick against pick. And the waters flowed from the spring to the pool, twelve hundred cubits." The 1,200-cubit measurement matches the actual tunnel length within margin.
8th-century BC literate Hebrew administration. The monumental paleo-Hebrew script confirms a literate Judahite administration capable of substantial public-works engineering in the late 8th century BC, against minimalist claims that Judahite literacy was Persian-period.

Biblical references

2 Kings 20.20, "how he made the pool and the conduit, and brought water into the city."
2 Chronicles 32.30, "This same Hezekiah also stopped the upper outlet of the waters of Gihon, and brought them down to the west side of the city of David."
Isaiah 22.9-11, Isaiah's reference to Hezekiah's preparation of Jerusalem's water supply.

Evidential status

Well-established mainstream consensus. The tunnel's existence, dating (late 8th century BC), and match with the biblical description are uncontested. The Siloam Inscription is one of the most important monumental Hebrew inscriptions of the First Temple period. Radiometric dating of the tunnel plaster (Frumkin and Shimron 2003) places construction firmly in the late 8th century BC, decisively against earlier minimalist hypotheses of a Hasmonean-period origin. The tunnel is one of the most direct site-confirmations of a specific Old Testament historical claim about a named Judahite king.

Common questions this page answers

Q: What is Hezekiah's Tunnel and is it real?

Hezekiah's Tunnel (also called the Siloam Tunnel) is a 533-meter rock-cut water tunnel carved through solid rock under Jerusalem in the late 8th century BC by King Hezekiah, to secure the city's water supply before the Assyrian siege of 701 BC. It is real, can be walked through today, and matches the biblical description in 2 Kings 20.20 and 2 Chronicles 32.30. The construction date has been confirmed radiometrically (Frumkin and Shimron 2003).

Q: What does the Siloam Inscription say?

The inscription, cut into the tunnel wall by the workmen at the moment they broke through, describes the meeting of the two digging teams: "While the diggers were still working with their picks, each toward his fellow, and while there were still three cubits to be cut through, there was heard the voice of a man calling to his fellow... and the diggers struck through, each to meet the other, pick against pick. And the waters flowed from the spring to the pool, twelve hundred cubits." It is the longest monumental paleo-Hebrew inscription from the period of the Judahite monarchy.

Q: Where is the Siloam Inscription today?

In the Istanbul Archaeology Museum. The Ottoman authorities removed the inscription from the tunnel wall in 1890 and transported it to Constantinople. The tunnel itself remains in Jerusalem, in the City of David archaeological park, and is open to the public for walking.

Q: Does Hezekiah's Tunnel confirm the Bible?

Yes, in three specific ways. The tunnel exists; its 533-meter length matches the biblical description; its 1,200-cubit measurement in the inscription matches the actual tunnel; and the late-8th-century BC date matches Hezekiah's reign (715-686 BC) and the historical context of the Assyrian threat (Sennacherib's 701 BC campaign). It is one of the most direct site-confirmations of a specific Old Testament event recorded about a named Judahite king.

Q: Did Hezekiah really build a tunnel under Jerusalem?

Yes. The tunnel, the inscription, the radiometric dating, and the engineering method (two teams working from opposite ends and meeting in the middle) all confirm that King Hezekiah of Judah constructed the water tunnel in the late 8th century BC, exactly as described in 2 Kings 20.20 and 2 Chronicles 32.30. This is mainstream archaeological consensus, not contested.