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AvantSvetitskhoveli cathédrale achevé1029 CE
AprèsEl Castillo de Chichén Itzá à son apogée1050 CE
Science et découverte

Bi Sheng (972–1051) was a Chinese artisan and engineer during the Song dynasty (960–1279), who invented the world's first movable type. Bi's system used fired clay tiles, one for each Chinese character, and was invented between 1039 and 1048. Printing was one of the Four Great Inventions.

Figures clésBi Sheng
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