| 467 Anaxagoras possibly sees sunspot. |
| 400 Greeks start to use shear-leg cranes for construction & loading of ships. |
| 400 Greeks develop an indirect lost wax process for casting bronze. |
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| Burnt brick first used in Greece. |
| Donkey-powered mills first used in Greece. |
| 309 Qin cut through shoulder of mountain, making 'Separated Hill' that abated Mo River, & excavated two canals in plain of Chengdu. significance of this was phenomenal, as it allowed new Guanxian irrigation system to populate an area of some 40 by 50 miles (60 × 80 km) with over five million people, still in use today |
| - Chinese astronomer Gan De divides celestial sphere into 365¼ degrees, & tropical year into 365¼ days when most astronomers used Babylon division of celestial sphere as 360 degrees |
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| 293 Time 1st divided into hours by a sundial of L. Papirius, Cursor at Rome. |
| 290 sixth wonder of world, Brass Colossus of Rhodes, built. |
| 284 - 48 Alexandrian Library |
| 280 Pharos of Alexandria, seventh wonder of world was built by Plolemy-Philadelphus. It was 550 feet high. |
| 263 - 46 17 1st Great Wall of China constructed |
| - Stone of Canopus (for Ptolemy III), No. 1, in Rosetta Stone Series of 3 stones. Implements Leap year in Egypt. Leap year not formally recognized until Caesar in 55 BC. |
| - Burial chamber, Tomb of Reliefs, Cerveteri, made. |
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| 174 Streets of Rome paved. |
| 170 First public bakery started in Rome. |
| - System for sending signs to communicate quickly over long distance described by Polybios |
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| 50s East torana of Great Stupa at Sanchi, is made. Early Andhra period. According to an inscription, it is sculpted by ivory carvers from nearby town of Vidisha. |
| - First dome built by Romans |
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European Iron Age 
Celtic rule throughout most of Continental Europe 
Cicero
Socrates 
Hippocrates
Virgil 
Ancient Olympic Games in Greece 
Hannibal
Old Testament written
Biblical Silence 
