First Council of Constantinople (381)
First Council of Constantinople took place in 381, during the Ancient World (4th century) — a moment that historians still return to for what it changed and what it revealed about its time.
Context
Ancient World — Empires, philosophers, and the first great cities. That's around 1589 years ago — deep history, roughly 16 centuries in the past. Around the same time, the world was also seeing Jerome's Vulgate (382) and Germanus of Auxerre (378).
Why it matters
First Council of Constantinople is remembered because its consequences outlasted the moment — the people affected, the decisions it forced, and the way it reset the story of what came next.
Did you know?
Just 1 year after, Jerome's Vulgate (382) was also making headlines — a reminder how much history can compress into a single decade.
Era
Ancient World
Empires, philosophers, and the first great cities.
Category
Events
Events tell the story of moments that reshaped daily life — disasters, revolutions, discoveries, and turning points that split history into before and after.
Contemporary events
What else was happening in the world around this time.
Sources & further reading7 verified references · tap to open
About this lesson. Overview, context, and “Why it matters” are generated summaries written for study and gameplay. Dates and category placement come from the Timeline question bank[1]; era descriptions are adapted from standard historical periodisation[2]. For primary sources and in-depth reading, use the references below.
- Timeline question bank — © the game's original author, used with permission.
- Era framework based on Wikipedia's Human history overview, CC BY-SA 4.0.
Wikipedia
Community-maintained encyclopedia entry with citations.
Encyclopædia Britannica
Editorially reviewed reference articles.
Library of Congress
Primary sources, photographs, and archival records.
National Archives
Original U.S. government documents and records.
Smithsonian
Museum collections and curator-written explainers.
BBC History
Long-form explainers and documentaries.
History.com
Timelines and topic overviews from HISTORY.
Educational content notice
Lessons are for general historical education, not professional advice. Some entries touch on wars, violence, or other sensitive events — appropriate for ages 9+. External links open in your browser and are not controlled by Timeline.
Quick check
Which of these happened in 381?
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Same era in category · 382
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Same era in category · 266
Jin
Same era in category · 391
Library of Alexandria by Theodosius I
3 yrs before · 378
Germanus of Auxerre
3 yrs before · 378
Germanus of Auxerre (Saint Germain), Roman clergyman