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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 • The Scandinavian city of Lund becomes a see of the Roman Catholic Church. |
1151
Jul 7
Age: 72y
| 1151 • After the Battle of Ghazni the city is burned by the prince of Ghur. |