Historical eventOctober 5869

Fourth Council of Constantinople (Catholic Church)

The Fourth Council of Constantinople, the eighth Catholic Ecumenical Council, was convened to discuss the patriarchate of Photios I of Constantinople.

Everything on October 5Original source

In context

When
Wednesday, October 5 8691157 years ago
Category
Historical eventA dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
Era
9th century · 860s
Calendar
Julian — as recorded at the time
Recorded from
Wikipedia “On this day” feed

Dates before 15 October 1582 are in the Julian calendar, so the weekday shown follows the Julian reckoning of the time.

At a glance

Dates: From 869.

What happened

The Fourth Council of Constantinople was the eighth ecumenical council of the Catholic Church held in Constantinople from 5 October 869, to 28 February 870. It was attended by over 103 bishops. In contrast, the pro-Photian council of 879–80 was attended by 383 bishops. The Council met in ten sessions from October 869 to February 870 and issued 27 canons.

October 5 through the years

Other entries on the same calendar day, in order.

  1. 869Fourth Council of Constantinople (Catholic Church)
  2. 1988Lloyd Bentsen
  3. 1990The Herald (Melbourne)
  4. 19911991 Jakarta Indonesian Air Force C-130 crash
  5. 1994Order of the Solar Temple
  6. 1999Ladbroke Grove rail crash
  7. 2000Overthrow of Slobodan Milošević
  8. 2000Colour revolution
  9. 2011Mekong River massacre
  10. 2014Jules Bianchi
  11. 2021Windows 11

Sources

Cite this page

“Fourth Council of Constantinople (Catholic Church)”, What's On This Date, https://whatsonthisdate.com/app/event/fourth-council-of-constantinople-catholic-church-869-october-5, accessed October 28, 2026.

Cite the underlying source as well — the source links above go to the record this entry is adapted from.

Questions about this entry

When did Fourth Council of Constantinople (Catholic Church) happen?

October 5 869 — 1157 years ago, on a Wednesday.

Is this a Julian or a Gregorian date?

It is the date as recorded at the time, on the Julian calendar. The Gregorian equivalent falls about ten days later; sources from different countries may give either.

Where does this text come from?

Wikipedia “On this day” feed. Summaries are short adaptations that link back to the source, not reprints.

How do I cite this page?

Use the ready-made citation near the sources at the bottom of the page, and follow the source link to cite the underlying record as well.

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