Pax Romana under the Five Good Emperors, Trajan's maximum territorial borders, and the flourishing Han Dynasty.
Notable 2nd Century Milestones
- 181 Aug 04: Supernova seen in Cassiopia.
- 141 Mar 20: 6th predicted perihelion passage of Halley's Comet.
- 121 Apr 20: Marcus Aurelius, Roman emperor is born.
- 197 Feb 19: D Clodius Septimus Albinus, Roman bequest in England, dies in battle.
- 155 Feb 23: Polycarp, disciple of Apostle John, arrested and burned at stake.