General
Population: Between 190 and 230 million*
- Geography: Claudius Ptolemy completes Geographia
- Medicine: Physician galen travels to Alexandria to study anatomy and publishes concept of humors (phlegm, blood, and biles)
- Science: Ptolmey writes Harmonics
Americas
- Mexico: Sun Temple built at Teotihuacán
Asia
- General: Huns control central Asia
- India: Earliest known Sanskrit writings
Europe
Pacific