The 2nd century

1,103 sourced entries across 100 documented years, grouped into 10 decades. A century here runs 1900–1999 rather than 1901–2000, so its decades sit inside it exactly.

Decades

The 100s — 10 years, 117 entries
The 110s — 10 years, 95 entries
The 120s — 10 years, 104 entries
The 130s — 10 years, 99 entries
The 140s — 10 years, 79 entries
The 150s — 10 years, 83 entries
The 160s — 10 years, 118 entries
The 170s — 10 years, 122 entries
The 180s — 10 years, 121 entries
The 190s — 10 years, 165 entries

By subject

Conflict & Security in the 2nd century — 164 entries
Geopolitics & Diplomacy in the 2nd century — 85 entries
Religion & Belief in the 2nd century — 82 entries
Exploration & Expansion in the 2nd century — 49 entries
Culture & Society in the 2nd century — 46 entries
Technology & Infrastructure in the 2nd century — 35 entries
Science & Discovery in the 2nd century — 24 entries
Crime & Justice in the 2nd century — 21 entries
Climate & Environment in the 2nd century — 17 entries
Health & Medicine in the 2nd century — 14 entries
Economy & Finance in the 2nd century — 10 entries

A few of the years

101Epictetus writes and publishes The Discourses of Epictetus (approximate date).
113Trajan's Column near the Colosseum in Rome is completed to commemorate the Emperor's victory over the Dacians in the Second Dacian War.
125Zhang Heng of Han dynasty China invents a hydraulic-powered armillary sphere.
137Tax laws are passed for trade in Palmyra. The caravan city grows rich by importing rare products from the Persian Gulf, and by exporting items manufactured by the Mediterranean world to the East.
150The Great Pyramid of the Sun is constructed in Teotihuacan. It is the tallest pre-Columbian building in the Americas.
162Lucius Verus begins a war with the Parthians, due to the invasion of Syria and Armenia by King Vologases IV of Parthia.
174Reign in India of Yajnashri Satakarni, Satavahana king of the Andhra. He extends his empire from the center to the north of India.
186Roman governor Pertinax escapes an assassination attempt, by British usurpers.