The Siloam Tunnel, also known as Hezekiah’s Tunnel, is a carved water channel beneath the City of David. In ancient times, it was located in the Arab neighborhood of Silwan in eastern Jerusalem. Its popular name derived from the most common hypothesis, dating back from the reign of Hezekiah of Judah (late 8th and early 7th century BC), and corresponds to the “conduit” mentioned in 2 Kings 20:20 in the Hebrew Bible. According to the Bible, King Hezekiah prepared Jerusalem for an impending siege by the Assyrians. He successfully blocked the source of incoming water from the upper Gihon, directing it down west to the City of David.