Su Song
Sciences & Discovery • Historical Archive • 🇨🇳 China • 9 views

Su Song 🇨🇳

蘇頌 (Known as "Master of the Astronomical Clock Tower")
Prime Minister, Astronomer, Horologist, Pharmacologist, Engineer
Born 1020 CE 🇨🇳 Tong'an (Xiamen, Fujian), China
Passed Away 1101 CE Kaifeng (Henan), China
Lifespan 81 years old
9 views
Notice / Correction
"The celestial spheres rotate above while the water wheels measure every second beneath; mechanical harmony mirrors heaven."

Archival Overview

Song Dynasty Prime Minister and engineer who designed the 40-foot water-driven astronomical clock tower of Kaifeng, featuring the world's earliest mechanical escapement and endless power-transmitting chain drive.

Biographical Record

Su Song (1020–1101 CE) was an eminent scholar-statesman who rose to Prime Minister (*Zai-xiang*) under Emperor Zhezong of the Northern Song. Between 1088 and 1092, he directed the construction of a colossal 40-foot hydraulic clock tower in the imperial capital of Kaifeng.

Known as the 'Water-Powered Spherical Birds-Eye-View Observatory', the tower featured an escapement mechanism that regulated time centuries before European mechanical clocks, an endless power-transmitting chain drive, a mechanical armillary sphere, and robotic mannequins that rang bells and sounded gongs on the hour. His illustrated treatise Xinyi Xiangfa Yao accurately preserved the engineering blueprints and mapped 1,464 stars on five celestial charts.

Key Life Milestones

1092 CE

Inauguration of the Kaifeng Clock Tower

Completed the 40-foot hydraulic clock tower uniting mechanical escapement, celestial globes, and automated chimes.

1094 CE

Publication of 'Xinyi Xiangfa Yao'

Published his illustrated treatise with mechanical blueprints and five epochal celestial star projections.

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Final Resting Place

Perpetual Memorial
Tong'an Su Song Memorial Park
Xiamen (Fujian), China
GPS: 24.7269, 118.1517
View on Memory Atlas
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