Hezekiah's Tunnel

Hezekiah’s Tunnel in Jerusalem5 min read

Welcome to the heart of ancient Jerusalem, where history flows through the stone walls of Hezekiah’s Tunnel. As we embark on this journey, let’s explore the practicalities and historical significance of this remarkable water tunnel, an engineering marvel from the times of King Hezekiah.

History and Context

Hezekiah’s Tunnel, also known as the Siloam Tunnel, stands as a testament to ancient engineering prowess. Constructed in the late 8th century BCE during the reign of King Hezekiah, this tunnel served a strategic purpose: to secure the city’s water supply during the Assyrian siege.

Stretching approximately 533 meters, Hezekiah’s Tunnel is an underground conduit that diverts water from the Gihon Spring to the Pool of Siloam. Navigating its winding and narrow passages provides an authentic experience of the challenges faced by the workers who carved this tunnel through solid rock.

Carved through solid limestone, the tunnel’s construction is a marvel of ancient engineering. The two teams of workers started at opposite ends, meeting in the middle with impressive precision. The tunnel features an incline, allowing gravity to guide the water flow, and the original inscription found inside the tunnel commemorates the successful completion of this monumental task.

Gihon Spring, the water source for Hezekiah’s Tunnel, was crucial for sustaining Jerusalem during times of siege. By diverting the water to the Pool of Siloam within the city walls, Hezekiah ensured a secure water supply, a strategic move that played a role in thwarting the Assyrian siege in 701 BCE.

Situated on a mountain, the city of Jerusalem faced a geographical challenge with its major water source, the Gihon Spring, located on a cliff overlooking the Kidron Valley. To address this vulnerability, the Canaanites had previously fortified the spring and created a well-protected corridor connecting it to the city walls. However, King Hezekiah, fearing an Assyrian siege, took additional measures. According to the Bible, he diverted the spring’s water through Hezekiah’s Tunnel into the Pool of Siloam, strategically blocking access to besieging forces.

Contrary to the original plan, it was discovered in 1997 that Warren’s shaft system, constructed earlier, had already heavily fortified the Gihon Spring. This shaft, not an aqueduct, required individuals to travel up and down it for water, a limitation that Hezekiah seemingly deemed insufficient. Additionally, the Middle Bronze Age channel, found in 1899, predating Hezekiah’s time, revealed that the spring’s water had already been diverted centuries before.

Hezekiah's tunnel
Siloam’s Pool (the upper) as shown when exiting Hezekiah’s tunnel

Discovery and Interpretation

The existence of Hezekiah’s Tunnel was first documented in modern times by Franciscus Quaresmius in 1625. Notably, American biblical scholar Edward Robinson explored the tunnel in 1838, followed by Charles Warren in 1865. While neither Quaresmius nor Robinson initially associated the tunnel with Hezekiah, Warren suggested in 1871 that the Pool of Siloam might have been “dug by King Hezekiah.” The discovery of the Siloam inscription in 1884 further fueled the belief that the tunnel aligned with Hezekiah’s preparations for the Assyrian siege.

Similar to ancient Persian qanats, the canal or culvert carved into the rock directed water from a primary source to a lower area for agricultural use. Warren’s Shaft, a well-like vertical shaft connected by a sloping tunnel, served for ventilation, light, and access during tunnel construction. The outlet featured a network of dams, gates, and channels for distributing water to various locations.

The Bible references Hezekiah’s tunnel in several verses, including 2 Kings 20:20, 2 Chronicles 32:2–4, and Isaiah 22:11. These passages recount Hezekiah’s achievements, the construction of the tunnel, and the blocking of the Gihon Spring’s upper outlet to secure the city against the Assyrian threat. These biblical accounts provide historical context to the purpose and significance of Hezekiah’s Tunnel in ancient Jerusalem.

The Shiloah inscription
The Shiloah inscription

The Shiloah inscription, also known as the Siloam inscription, was discovered in the tunnel. Dated to the 8th century BC based on its writing style, this inscription stands as a unique archaeological find, serving as the sole known ancient inscription from ancient Israel and Judah that commemorates a public construction project. This is a notable departure from the common practice in Egyptian and Mesopotamian archaeology, where such inscriptions celebrating public works were prevalent.

Remarkably, the Shiloah inscription ranks among the earliest existing records of its kind, composed in Hebrew using the Paleo-Hebrew alphabet – a regional variant derived from the Phoenician alphabet. Preserved and housed at the Istanbul Archaeology Museum, this inscription provides a tangible link to the construction of the historic Siloam tunnel, offering valuable insights into the technological and cultural aspects of ancient Israel during the 8th century BC.

Visiting Hezekiah’s Tunnel

Today, visitors can experience this ancient marvel by walking through the tunnel’s subterranean passages. The journey is approximately knee-deep in water, so wearing appropriate footwear is advisable. The dimly lit, winding path gives an authentic feel of the tunnel’s original purpose and the challenges faced by those who constructed it.

Hezekiah’s Tunnel is not just an ancient water conduit; it’s a tangible link to Jerusalem’s past. As we traverse its depths, we connect with the engineering ingenuity of ancient times and appreciate the strategic thinking that shaped the city’s resilience. Step into the cool waters of history and let Hezekiah’s Tunnel reveal the practical and historical dimensions of this remarkable archaeological site.

Nearby: The Jerusalem Trail: Best Walk in the Holy City | The Southern Wall in Jerusalem

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