Gihon Spring in the context of City of David (historic)

Jerusalem is one of the world's oldest cities, with a history spanning over 5,000 years. Its origins trace back to around 3000 BCE, with the first settlement near the Gihon Spring. The city is first mentioned in Egyptian execration texts around 2000 BCE as "Rusalimum." By the 17th century BCE, Jerusalem had developed into a fortified city under Canaanite rule, with massive walls protecting its water system. During the Late Bronze Age, Jerusalem became a vassal of Ancient Egypt, as documented in the Amarna letters.

The city's importance grew during the Israelite period, which began around 1000 BCE when King David captured Jerusalem and made it the capital of the united Kingdom of Israel. David's son, Solomon, built the First Temple, establishing the city as a major religious center. Following the kingdom's split, Jerusalem became the capital of the Kingdom of Judah until it was captured by the Neo-Babylonian Empire in 586 BCE. The Babylonians destroyed the First Temple, leading to the Babylonian exile of the Jewish population. After the Persian conquest of Babylon in 539 BCE, Cyrus the Great allowed the Jews to return and rebuild the city and its temple, marking the start of the Second Temple period. Jerusalem fell under Hellenistic rule after the conquests of Alexander the Great in 332 BCE, leading to increasing cultural and political influence from Greece. The Hasmonean revolt in 1the 2nd century BCE briefly restored Jewish autonomy, with Jerusalem as the capital of an independent state.

The City of David (Hebrew: עיר דוד, romanized: ʿĪr Davīd), known locally mostly as Wadi Hilweh (Arabic: وادي حلوة, romanized: Wādī Ḥulwah), is the name given to an archaeological site considered by most scholars to be the original settlement core of Jerusalem during the Bronze and Iron Ages. It is situated on southern part of the eastern ridge of ancient Jerusalem, west of the Kidron Valley and east of the Tyropoeon Valley, to the immediate south of the Temple Mount and separated from it by the so-called Ophel saddle.

The City of David is an important site of biblical archeology. Remains of a defensive network dating back to the Middle Bronze Age were found around the Gihon Spring; they continued to remain in use throughout subsequent periods. Two monumental Iron Age structures, known as the Large Stone Structure and the Stepped Stone Structure, were discovered at the site. Scholars debate if these may be identified with David or date to a later period. The site is also home to the Siloam Tunnel, which, according to a common hypothesis, was built by Hezekiah during the late 8th century BCE in preparation for an Assyrian siege. However, recent excavations at the site suggested an earlier origin in the late 9th or early 8th century BCE. Remains from the early Roman period include the Pool of Siloam and the Stepped Street, which stretched from the pool to the Temple Mount.

The newer Siloam Tunnel (Hebrew: נִקְבַּת הַשִּׁלֹחַ, romanized: Nikbat HaShiloaḥ), also known as Hezekiah's Tunnel (תעלת חזקיהו, Te'alát Ḥizkiyáhu), is a water tunnel that was carved within the City of David in ancient times, now located in the Arab neighborhood of Silwan in eastern Jerusalem. Its popular name is due to the most common hypothesis that it dates from the reign of Hezekiah of Judah, late 8th and early 7th century BC, and corresponds to the "conduit" mentioned in 2 Kings 20 (2 Kings 20:20) in the Hebrew Bible. According to the Bible, King Hezekiah prepared Jerusalem for an impending siege by the Assyrians, by "blocking the source of the waters of the upper Gihon, and leading them straight down on the west to the City of David" (2 Chronicles 32:30). By diverting the waters of the Gihon, he prevented the enemy forces under Sennacherib from gaining access to water. An older water system, sometimes called the Siloam Channel, partly fulfilled a similar purpose and dates back to the Canaanites (Bronze Age).

The idea of dating the tunnel to Hezekiah's period was derived from the Biblical text that describes construction of a water tunnel in his time. Scientific support for this, however, came from radiocarbon dates of organic matter contained in the original plastering as well as radiometry (uranium-thorium dating of speleothems). The dates were challenged in 2011 by new excavations that suggested an earlier origin in the late 9th or early 8th century BC.

The term Pool of Siloam (Hebrew: בְּרֵכַת הַשִּׁילוֹחַ, Modern: Brekhat hashiloaḥ, Tiberian: Bərēḵaṯ hašŠiloḥ, Levantine Arabic: بِرْكَة سِلْوَان, romanized: Birka Silwān) refers to several rock-cut pools located southeast of the walls of the Old City of Jerusalem. The pools were fed by the waters of the Gihon Spring, carried there by the Siloam tunnel.

The Lower Pool or "Old Pool" (הַבְּרֵכָ֣ה הַיְשָׁנָ֑ה, according to Isaiah 22:11) was historically known in Palestinian Arabic as Birket el-ḥamra "the Red Pool."