Archaeologists in Jerusalem have discovered a massive 2,800-year-old dam near the Pool of Siloam, where Jesus is said to have healed a blind man, offering new insight into ancient history.
Historic Discovery in Jerusalem
Archaeologists have uncovered a 2,800-year-old dam in Jerusalem’s City of David, just steps away from the Pool of Siloam, a site tied to one of Jesus’ most famous miracles.
According to the Gospel of John, Jesus healed a blind man by placing mud on his eyes and telling him to wash in the Pool of Siloam. The pool, which was rediscovered in 2004, holds deep biblical significance for Christians worldwide.
Largest Ancient Dam Ever Found in Israel
The discovery was announced on August 30, 2025, following a joint excavation by the Israel Antiquities Authority (IAA) and the Weizmann Institute of Science.
The massive stone structure measures 39 feet high, 69 feet long, and 26 feet wide, making it the largest ancient dam ever found in Israel and the oldest known in Jerusalem.
Researchers dated the dam to between 805 and 795 BC, during the reign of either King Joash or King Amaziah, using preserved twigs and branches in the mortar.
Ancient Solution to Climate Change
Experts believe the dam was built as a response to a climate crisis.
“The dam was designed to collect waters from the Gihon Spring as well as floodwaters flowing down the main valley of ancient Jerusalem,” the excavation team explained.
They noted that Jerusalem at the time faced low rainfall with occasional intense storms, forcing its people to engineer large-scale water systems to survive.
A Window Into the First Temple Period
Eli Escusido, director of the IAA, described the find as “one of the most impressive and significant First Temple-period remains in Jerusalem.”
He added:
“In recent years, Jerusalem has been revealed more than ever before… and many surprises still await us.”
This extraordinary discovery connects biblical history, climate adaptation, and human resilience—while giving fresh context to the setting of one of Jesus’ most meaningful miracles.
