In 2004, during repair work on a sewage pipe in the City of David area of Jerusalem, workers uncovered stone steps that turned out to be part of the Pool of Siloam — the very pool where Jesus sent the blind man to wash and receive his sight (John 9:7).
Archaeologists Ronny Reich and Eli Shukron excavated the site and revealed a large, stepped pool dating to the late Second Temple period (first century BC to first century AD). The pool was fed by the waters of the Gihon Spring through Hezekiah's Tunnel, consistent with the biblical description.
Previously, scholars had identified a much smaller Byzantine-era pool as the Pool of Siloam. The 2004 discovery revealed that the actual first-century pool was significantly larger — approximately 225 feet long — and was a public ritual immersion pool (mikveh) used for purification before ascending to the Temple.
This discovery confirmed several aspects of John's Gospel: the pool existed, it was in the location John described, it was a functioning pool during the time of Jesus, and its use for ritual washing gives added meaning to Jesus' instruction. The connection between physical washing and spiritual healing would have been immediately understood by a first-century Jewish audience.