How Did UNESCO Move the Temples of Abu Simbel?

Between 1964 and 1968, UNESCO led an international campaign to physically dismantle the ancient rock-cut temples of Abu Simbel — sawing them into more than 1,000 blocks weighing up to 30 tons each — and rebuild them 213 feet higher and 690 feet back from the Nile to save them from the rising waters of Lake Nasser.

Why the Temples Had to Move

The temples of Abu Simbel were carved into a sandstone cliff on the west bank of the Nile around 1264 BCE, commissioned by Pharaoh Ramesses II. For over 3,200 years they stood largely undisturbed. That changed in the 1960s, when Egypt began construction of the Aswan High Dam. The dam was designed to control the Nile’s annual floods and generate electricity — but its reservoir, Lake Nasser, would swallow a vast stretch of the river valley, including Abu Simbel.

The temples’ two facades are dominated by four colossal seated statues of Ramesses II, each roughly 66 feet tall — about the height of a six-story building. Once submerged, they would have been lost permanently. Nearly 50 countries decided that outcome was unacceptable.

The $40 Million International Rescue

UNESCO launched a fundraising and engineering campaign that ultimately cost around $40 million, contributed by nations across the globe. The scale of international cooperation was unprecedented for a cultural heritage project. Engineers considered several proposals — including building a transparent dam around the temples — before settling on the most ambitious option: cut the entire complex into transportable pieces and move it.

Workers used fine-toothed hand saws and wire saws to slice through the porous sandstone, keeping each cut to roughly a quarter of an inch wide to minimize damage to the carved surfaces. Wherever the stone was fragile or cracked, technicians injected synthetic resin to stabilize it before the blocks were separated. Every cut was planned so that joints would fall in inconspicuous places on the finished reconstruction.

Lifting a Pharaoh’s Face, Block by Block

The four colossal statues fronting the Great Temple were dismembered systematically — face by face, crown by crown. In total, the temples were divided into more than 1,000 numbered blocks. Each piece was catalogued, lifted by crane, and trucked up the cliff to the new site. The operation ran continuously for four years.

At the new location, engineers didn’t simply stack the blocks back up. They constructed two artificial domes of reinforced concrete to bear the load of the reconstructed hillside built over the temples, so that from the outside, Abu Simbel still appears to emerge from living rock.

The Sun Still Finds Its Way In

One of the most demanding aspects of the relocation was preserving the temples’ astronomical alignment. The original architects had oriented the Great Temple so that twice a year — around February 22 and October 22 — the rising sun travels the full length of the 180-foot corridor and illuminates the statues of Ramesses II, Ra-Horakhty, and Amun in the inner sanctuary. Only the god Ptah, associated with the underworld, remains in darkness year-round.

After relocation, engineers managed to re-aim the temple closely enough that the solar phenomenon still occurs — though it is believed to fall approximately one day off the ancient dates, a nearly unavoidable consequence of the move.

A Legacy Beyond Abu Simbel

The Abu Simbel rescue is still considered the largest archaeological relocation ever attempted. Its success demonstrated that humanity could mobilize international resources to protect irreplaceable cultural sites — and it made the case for a binding global framework to do so more proactively. The operation directly inspired the UNESCO World Heritage Convention of 1972, the international treaty that now designates and protects more than 1,000 sites around the world.

They moved a 3,200-year-old temple. Then they wrote the rules so the world would never have to scramble like that again.