Biblical context · Approved edition

Hezekiah and the Siloam Tunnel

The second book of Kings tells how the Assyrian king Sennacherib invades Judah, how Hezekiah brings his distress to the temple and how Jerusalem is delivered. We will first observe the sacred text and then the Siloam Tunnel, other finds from Hezekiah’s Jerusalem and what the Assyrian sources themselves say.

By the end: you will be able to distinguish what the sacred text affirms, what the tunnel, the seals and the Assyrian documents show, and what remains an open question.

Passage
2 Kings 18:13–19:37 and 20:20 (with 2 Chronicles 32:1–5, 30 and Isaiah 36–37)
Central question
What does the account of Jerusalem’s deliverance affirm, and what can the Siloam Tunnel and the Assyrian documents contribute?
Estimated reading time
10–12 minutes
Status
Approved for publication · version 1.0

First, look at the sacred text

Observe before reconstructing

Read 2 Kings 18:13–19:37 and 20:20 and follow the movement of the account: what does Sennacherib do, what does the Assyrian envoy ask, where does Hezekiah take the letter and how does God answer?

Compare with a guided observation
ElementWhat the passage tells us
The invasionIn Hezekiah’s fourteenth year, Sennacherib comes up against the fortified cities of Judah and takes them (2 Kings 18:13).
The tributeHezekiah sends silver and gold to Lachish, even stripping the doors of the temple (18:14–16).
The challengeThe Rabshakeh speaks by the conduit of the upper pool and asks: “What confidence is this in which you trust?” (18:17–19).
The prophetHezekiah tears his clothes, goes into the house of the Lord and sends to consult Isaiah, who answers: “Don’t be afraid” (19:1–7).
The letter in the templeHezekiah spreads Sennacherib’s letter before the Lord and prays that all kingdoms may know that he alone is God (19:14–19).
The answerThe king of Assyria will not come into the city or shoot an arrow there: “I will defend this city to save it” (19:32–34).
The deliveranceThe angel of the Lord strikes the Assyrian camp; Sennacherib returns to Nineveh, where two of his sons kill him (19:35–37).

The tunnel appears almost in passing: Hezekiah “made the pool and the conduit, and brought water into the city” (2 Kings 20:20; see 2 Chronicles 32:30). The text gives neither its length, its course nor the exact date of the work.

Degrees of certainty

What can be recognized and what remains open

Archaeology helps when three things are kept apart: the objects and works that can be studied, the specialists’ interpretations and the event narrated by Scripture.

Widely recognized context

Hezekiah in sources from his own time

Hezekiah’s name appears on an impression of his royal seal found on the Ophel in Jerusalem (“Belonging to Hezekiah, son of Ahaz, king of Judah”) and in the Assyrian annals of Sennacherib, written a few years after 701 BC.

Widely recognized context

The Assyrian campaign of 701 BC

Sennacherib’s annals and the reliefs from his palace at Nineveh, now in the British Museum, show that the Assyrian army ravaged Judah and conquered Lachish, as 2 Kings 18:13–17 says.

Widely recognized context

An Iron Age tunnel

The tunnel carries water from the Gihon Spring to the Pool of Siloam. Its inscription in Old Hebrew, found in 1880, tells how the two work crews met, and a radiometric study in 2003 placed it in Iron Age II, around 700 BC.

Unproven identification

What happened to the Assyrian army?

2 Kings 19:35 attributes the withdrawal to the action of the angel of the Lord. The Assyrian annals mention neither a disaster nor the capture of Jerusalem; some specialists suggest that trouble in Babylon contributed to the withdrawal. Exactly how it came about cannot be determined from the available sources.

Unproven identification

The date of the tunnel and of the reign

Reich and Shukron date the tunnel about a century before Hezekiah on the basis of pottery found in a fill; others keep the date of his reign. In addition, 2 Kings 18:13 points to an accession around 715 BC, while 18:1 and 18:9–10 place it before the fall of Samaria (722 BC). Both questions are still debated.

Three complementary lenses

How to read the account and its finds

These three lenses do not compete with each other: they answer different questions and must keep different degrees of certainty.

01

Theological reading: Hezekiah’s trust and the deliverance

Conceptual illustration of “Theological reading: Hezekiah’s trust and the deliverance”. It is a visual aid and does not constitute historical, archaeological or geographical evidence.

What it contributes

It brings to the fore the Rabshakeh’s question: “What confidence is this in which you trust?” (2 Kings 18:19). The account answers by showing a king who trusts neither Egypt nor his walls but the Lord, and a God who defends his city “for my own sake, and for my servant David’s sake” (19:34).

Which details it helps explain

The praise in 18:5 (“He trusted in the Lord, the God of Israel”), the letter spread out in the temple and the prayer of 19:15–19, Isaiah’s word (19:6–7, 32–34) and the deliverance (19:35–37). Isaiah 36–37 repeats the account almost word for word, and 2 Chronicles 32 adds the exhortation: “With him is an arm of flesh, but with us is the Lord our God” (32:8).

Which limit must remain

The theological reading does not by itself fix the date of the waterworks or explain how the Assyrian withdrawal came about.

Related readings: source 1.

02

Hezekiah’s Jerusalem: tunnel, wall and seal

Conceptual illustration of “Hezekiah’s Jerusalem: tunnel, wall and seal”. It is a visual aid and does not constitute historical, archaeological or geographical evidence.

What it contributes

It places the account in concrete works and objects. The Siloam Tunnel, cut through the rock, carries water from the Gihon Spring to the Pool of Siloam, and its inscription tells how the two crews heard each other through the rock and met. In the Jewish Quarter a stretch of the “Broad Wall”, about 7 metres thick, has been preserved.

Which details it helps explain

The six-line inscription (found in 1880, now in the Istanbul Archaeological Museum) gives the tunnel a length of 1200 cubits, a little over half a kilometre. The study by Frumkin, Shimron and Rosenbaum (2003) dated the plaster and the stalactites by radiocarbon and uranium-thorium. The Broad Wall is linked with Isaiah 22:9–10 and 2 Chronicles 32:5. On the Ophel, Eilat Mazar found a bulla just over a centimetre across bearing Hezekiah’s name, a winged sun and two symbols of life.

Which limit must remain

The Siloam inscription names no king: the attribution to Hezekiah rests on 2 Kings 20:20, 2 Chronicles 32:30 and the dating, and some propose earlier dates.

Related readings: source 2 and source 3 and source 4 and source 5 and source 6.

03

Sennacherib’s campaign of 701 BC

Conceptual illustration of “Sennacherib’s campaign of 701 BC”. It is a visual aid and does not constitute historical, archaeological or geographical evidence.

What it contributes

It lets us read the same conflict from the Assyrian side. Sennacherib’s annals, preserved on clay prisms such as the Taylor Prism (British Museum), the one in the Oriental Institute in Chicago and the one in the Israel Museum, say that he shut Hezekiah up in Jerusalem “like a bird in a cage” and received a large tribute.

Which details it helps explain

The Lachish reliefs, carved for the palace at Nineveh (around 700–692 BC), show the siege and capture of the city where Sennacherib received Hezekiah’s payment (2 Kings 18:14). As the Israel Museum notes, the prism describes neither the conquest nor an explicit siege of Jerusalem; it thus agrees with 2 Kings 19:32 that the city was not taken, although each source presents the outcome in its own way.

Which limit must remain

The Assyrian annals are royal propaganda: they highlight victories and pass over setbacks, so on their own they are not enough to reconstruct what happened before Jerusalem.

Related readings: source 1 and source 7 and source 8.

Comparison of lenses

What each approach answers and leaves unanswered

ApproachBasisMain contributionLimit
Theological readingThe sequence and motives of 2 Kings 18–19 and its parallels.Shows Hezekiah’s trust and God as the defender of his city.Does not date the tunnel or explain the withdrawal.
Hezekiah’s JerusalemThe Siloam Tunnel and inscription, the Broad Wall and the royal bulla.Gives real works and objects to the city’s preparations.The date of the tunnel is still debated.
Assyrian campaignSennacherib’s prisms and the Lachish reliefs.Confirms the invasion and shows the Assyrian version.It is propaganda and is silent on what happened before Jerusalem.

Criterion: the sacred text, the archaeological finds, the Assyrian documents and the proposed dates are presented as different levels of evidence.

What you can now recognize

What archaeology and the Assyrian sources contribute to the Hezekiah account

Few biblical episodes have so many external witnesses: Hezekiah’s name on his own seal, the Siloam Tunnel and its inscription, a defensive wall, Sennacherib’s annals and the Lachish reliefs. Even so, the exact date of the tunnel, the chronology of the reign and the way the Assyrian army withdrew remain open questions.

The centre of the account lies in what God does: he hears a cornered king who brings the threat into the temple, and he defends his city so that all kingdoms may know that he alone is God. Archaeology illuminates the setting; the sacred text defines the message.

Return to the sacred text

What does this add to my reading?

1. What do you trust in?

According to 2 Kings 18:19–22, which supports of Hezekiah’s trust does the Rabshakeh call into question?

See a guided answer

The Rabshakeh mocks trust in Egypt, which he calls a “bruised reed”, and trust in the Lord. The question runs through the whole account: Judah has walls, water and tribute, but the text shows that its true security lies in God.

2. The prayer in the temple

In 2 Kings 19:14–19, what does Hezekiah do with Sennacherib’s letter, and what does he ask for in his prayer?

Return to 2 Kings 19:15–19
See a guided answer

Hezekiah spreads the letter before the Lord, acknowledges him as the only God of all the kingdoms and maker of heaven and earth, and asks to be saved “that all the kingdoms of the earth may know that you, Lord, are God alone” (19:19). His request looks beyond his own safety: to the glory of God.

Result of the journey: you can now recognize the central message of the account, relate it prudently to the Siloam Tunnel and the Assyrian documents, and explain fairly which questions of date and history remain open.

Key terms

Brief glossary

Gihon
Spring on the eastern slope of the City of David, the main water source of ancient Jerusalem (2 Chronicles 32:30).
Siloam inscription
Six-line text in Old Hebrew carved into the tunnel wall; it tells of the meeting of the two crews of stonecutters.
Bulla
Small lump of clay bearing a seal impression, used to close and authenticate documents.
Rabshakeh
Title of a high Assyrian official; in 2 Kings 18 he is Sennacherib’s spokesman before the walls of Jerusalem.
Sennacherib Prism
Clay prism bearing the Assyrian king’s annals in cuneiform script; several almost identical copies survive.

Editorial record

Scope and review

Responsible person
Jose A Bejarano V
Version
1.0 · trilingual edition
Last reviewed
Approved for publication by the responsible editor on 27 September 2026
Method
A guided reading that distinguishes the sacred text, the historical and archaeological context and theological interpretations.

About the images: the illustrations are conceptual visual aids; they do not constitute historical, archaeological or geographical evidence.

Sources for further study

Works consulted

  1. The Metropolitan Museum of Art (Ira Spar): “Sennacherib and Jerusalem” — the campaign of 701 BC, the Lachish reliefs, Sennacherib’s annals and the account in 2 Kings.
  2. Bible Odyssey (Society of Biblical Literature): “The Siloam Inscription and Hezekiah’s Tunnel” — translation and context of the inscription found in 1880 and kept in the Istanbul Archaeological Museum.
  3. Frumkin, Shimron y Rosenbaum, Nature 425 (2003): “Radiometric dating of the Siloam Tunnel, Jerusalem” — radiocarbon and uranium-thorium dating that places the tunnel in Iron Age II, around 700 BC.
  4. Biblical Archaeology Society: “Hezekiah’s Tunnel Reexamined” — Ronny Reich and Eli Shukron’s proposal to date the tunnel a century before Hezekiah.
  5. Biblical Archaeology Society: “King Hezekiah in the Bible: Royal Seal of Hezekiah Comes to Light” — the impression of Hezekiah’s royal seal found by Eilat Mazar on the Ophel.
  6. Biblical Archaeology Society (Nathan Steinmeyer): “Missing Wall of Biblical Jerusalem Discovered” — the eastern wall of the City of David and the “Broad Wall” in the Jewish Quarter, attributed to Hezekiah.
  7. Associates for Biblical Research: “Artifact of the Month: Sennacherib Prism” — the prism in the Oriental Institute in Chicago and the Taylor Prism in the British Museum.
  8. The Israel Museum, Jerusalem: “The Assyrian Campaign in Judah as told in the Sennacherib Prism” — the prism of 691 BC displayed in Jerusalem and what it says, and does not say, about the city.