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General

Population: Between 190 and 230 million*

• Religion: Mohammed's vision on Mt Hira
  Sergius becomes patriarch of Constantinople
  First recorded use of episcopal rings
  Koran compiled (start)
• Deaths: Byzantine Emperor Phocas

Asia

• China: Chinese build grand canal to link Yangtze with Chang'an
  Plague hits Canton, China

Middle East

• Byzantine Empire: Phocas of East Roman Empire deposed and killed – succeeded by Heraclius
  East Roman Empire becomes known as Byzantine Empire