Theme · 4 sitesThe giant monoliths
Single blocks, carved and sometimes erected, whose transport still defies our models.
How do you move hundreds of tonnes in a single block — and why?
A theme gathers cases that overlap — it asks the question, it asserts no cause. Each site keeps its status and its sources.
DebatedStelae of Axum
Monolithic towers 33 meters tall, carved like 13-story buildings. In the 4th century, Axum was one of the four great world powers according to the prophet Mani. The largest was never successfully raised — and no text says how the others were.
DebatedUnfinished obelisk of Aswan
The unfinished obelisk of Aswan would have been the largest ever cut (~42 m, ~1,100 t): abandoned mid-extraction because of cracks in the rock. Experimental archaeology has shown that dolerite pounders and quartz abrasives are enough to explain the cutting and polishing of the granite — without resorting to impossible tools. What remains an open question is not the 'how to cut' but the 'how to move': the details of the logistics of extracting, loading and erecting a monolith of this mass remain the real-scale mystery.
ConsensusUnfinished stele of Yangshan
In 1405, Emperor Yongle commissioned the largest stele in the world to honor his father. 73 meters if erected, ~31,000 tons in total. Cut in 3 pieces from the mountain 15 km from the Ming mausoleum — and never moved. It is still there.
ConsensusDolmen of Menga (Antequera)
An Andalusian dolmen whose capstone weighs 150 tonnes — the heaviest ever moved in Iberia. The only one in Europe to carry interior pillars, it does not target the sun like the others, but a mountain shaped like a face.