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- 2nd century

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2nd century

(Redirected from 2nd century AD)

(1st century - 2nd century - 3rd century - other centuries)



Contents

Events

Significant persons

Inventions, discoveries, introductions

  • Cai Lun invents paper (c. 105)
  • Ptolemy compiles a catalogue of all stars visible to the naked eye.

Decades and years

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