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1079
| 1079 • Persian astronomer, Omar Khayyám, computed the length of the year to be exactly 365.24219858156 days, the most accurate calculation of his time. Khayyam also, in Treatise on Demonstrations of Problems in Algebra, produced a complete classification of cubic equations and their geometric solutions. |
about
Age: 24y
1103
Age: 24y
birth of childAénor of Châtellerault 1 Source ⇓ |
| 1103 • Anselm, Archbishop of Canterbury, goes into exile after a dispute with Henry I of England. |
1151
Jul 7
Age: 72y
| 1151 • Anping Bridge is completed in China's Fujian province. Its total length will not be exceeded until 1846. |