c. 1100
Technology
Southeast Asia
Angkor hydraulic city
Khmer engineers built barays and canals irrigating a metropolis of a million people.
Why it mattered
The largest pre-industrial urban complex in the world.
Middle Ages
1100
3 recorded milestones at this point in the record.
c. 1100
Transportation
Oceania
Polynesian double-hulled voyaging canoe
Lashed twin hulls with crab-claw sails carried families, crops and animals across the Pacific.
Why it mattered
A vessel type unmatched for range and payload in its era.
c. 1100
Technology
France
Gothic rib vault and flying buttress
Skeletal stone frames carried loads outward, freeing walls for glass.
Why it mattered
A structural revolution in architecture.
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Nearby in the record
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Movable type
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1088Technology
Mechanical escapement clock
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1088Society
University of Bologna
Italy
c. 1150Energy
Windmill in Europe and the vertical axle in Persia
Europe
c. 1150Energy
Water-powered fulling and sawmills
Europe