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| c. 1050 |
| | | The rulers of Baghdad harness homing pigeons as postmen. | |
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| c. 1050 |
| | | The earliest surviving reference to the principle of the compass occurs in a Chinese manuscript | |
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| 1054 |
| | | Astronomers in China and Japan observe the explosion of the supernova which is still visible as the Crab Nebula | |
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| 1055 |
| | | Togrul Beg enters Baghdad and is granted by the caliph the title of sultan, which becomes hereditary in his Seljuk dynasty | |
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| 1064 |
| | | Su Sung, a Buddhist monk, develops in China the principle of the escapement in his tower clock worked by a water wheel | |
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| c. 1071 |
| | | The campaigns of Alp Arslan, culminating in 1071, give the Seljuk Turks a lasting presence in Anatolia | |
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| 1071 |
| | | The Seljuk Turks and the Byzantines meet in battle at Manzikert, with victory going to the Turks | |
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| c. 1080 |
| | | Omar Khayyám, mathematician and astronomer, writes four-line verses, or quatrains, in his spare time | |
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| 1082 |
| | | Venice acquires valuable trading privileges from Constantinople, her merchants being excused all dues and customs in the Byzantine empire | |
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| 1098 |
| | | After a siege of seven months, the city of Antioch falls to the knights of the first crusade | |
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