The construction of the Aswan High Dam in the 1960s created Lake Nasser — and threatened to permanently submerge the Abu Simbel temples, carved into a mountainside by Ramses II around 1264 BCE. UNESCO led an international rescue campaign that relocated both temples roughly 64 metres higher and 180 metres further inland (UNESCO's official figures; some secondary sources round to 65 m/200 m), completed in 1968 after four years of work.

The method chosen wasn't a whole-structure move. It was disassembly: over 1,000 individually numbered stone blocks, cut, catalogued, transported, and reassembled — while substantially preserving the solar phenomenon associated with the temples' original orientation.

1,000+
Numbered blocks
~30 t
Heaviest blocks
64 m
Raised in elevation
180 m
Moved inland
4 years
1964–1968
Stage 1
Site preparation and method selection
A cofferdam was erected around Abu Simbel to buy time as Lake Nasser's water level rose. Several relocation concepts — including an underwater viewing chamber and raising the intact temples on hydraulic jacks — were rejected on cost grounds in favour of a cutting method proposed by a Swedish engineering firm.
Stage 2
Cutting and reinforcing over 1,000 blocks
Both temples, including the colossal statues of Ramses II, were cut into more than 1,000 individually numbered blocks weighing up to roughly 30 tonnes each. Weak sandstone sections were injected with synthetic resin before cutting, so the fragile stone would survive handling without fracturing.
Stage 3
Crane lifting, cataloguing, and transport
Each block was crane-lifted to a dedicated storage "block yard," catalogued against its original position, and transported to the new site — 180 metres further inland and 64 metres higher than the temples' original location, per UNESCO's account.
Stage 4
Reassembly with preserved solar alignment
The temples were rebuilt around an artificial hill supported by reinforced concrete arches and protective domes. Engineers carried out astronomical calculations during reassembly so sunlight would continue to reach the interior statues at approximately the same time of year as before relocation; commonly cited accounts describe the observed dates as shifting by roughly a day.
Reproducing a relationship, not only a structure

The temples had to be reconstructed so that sunlight would continue to penetrate the sanctuary at approximately the same times of year as before relocation. That made orientation and astronomical calculation part of the reassembly criteria alongside structural fit-up — though commonly cited accounts describe the observed illumination dates as shifting by roughly a day from the pre-relocation pattern.

Every other heavy-transport project on this site moves a structure. This one moved a structure and reproduced its relationship to the sun.

Abu Simbel remains one of the most complete demonstrations that heavy transport is not always about a single continuous move — sometimes the engineering answer is full disassembly, individually tracked components, and reassembly against a tolerance that has nothing to do with structural loading.

For further reading, see Heavy Transport Engineering and What is Temporary Works & Erection Strategy?, which cover the staging logic behind projects where reassembly tolerance is as critical as the move itself.

Related case studies: Ramses II Relocation · NASA Crawler-Transporter · 39 Fizuli Street

Sources: We Build Value (Salini Impregilo) — consortium member responsible for the artificial hill and reconstruction: cutting rules limiting ceiling blocks to 20 tonnes and façade blocks to 30 tonnes, and the May 1965 trial cut; Atlas Copco — equipment supplier's account: the ±5 mm reassembly tolerance, the 200 m inland / 65 m higher relocation, and preservation of the solar alignment. Published block counts vary widely across sources — 1,035, 1,042, and figures above 2,000 all appear — and block weights are given as 20–30 tonnes depending on position in the structure.