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| Contents |
| Events |
| By Place |
| Europe |
| Africa |
| Asia |
| Births |
| Deaths |
Events
By Place
Europe
★ Bede publishes ''On the reckoning of time'' ''De temporum ratione'' calculating dates from the birth of Christ. The AD system is subsequently disseminated throughout western Europe.
Africa
★ In Egypt resentment of the Copts against taxation, led to a revolt.
Asia
★ In China, the Tang Dynasty Buddhist monk, astronomer, and mechanical engineer Yi Xing applies the world's earliest known clockwork escapement mechanism to provide rotating motion to his astronomical armillary sphere.
Births
★
Deaths
★ April 23 — Wihtred, king of Kent
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