Pope Leo IV

Historical eventApril 10847

Pope Leo IV

Pope Leo IV was consecrated without imperial consent following the Saracen sack of Rome.

Everything on April 10Original source
Photo: MarkusMark · CC BY-SA 3.0

In context

When
Sunday, April 10 8471179 years ago
Category
Historical eventA dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
Era
9th century · 840s
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 847.

Type: human.

What happened

Pope Leo IV was the bishop of Rome and leader of the Papal States from 10 April 847 to his death in 855. He is remembered for repairing Roman churches that had been damaged during the Arab raid against Rome, and for building the Leonine Wall around Vatican Hill to protect the city. Pope Leo organized a league of Italian cities who fought and won the sea Battle of Ostia against the Saracens.

April 10 through the years

Other entries on the same calendar day, in order.

  1. 847Pope Leo IV
  2. 1991South Atlantic tropical cyclone
  3. 1992First Nagorno-Karabakh War
  4. 1998Good Friday Agreement
  5. 2009Josefa Iloilo
  6. 2009President of Fiji
  7. 2010Polish Air Force
  8. 20162016 Afghanistan earthquake
  9. 2016Puttingal temple fire
  10. 2019Event Horizon Telescope
  11. 20232023 Louisville bank shooting

Sources

Cite this page

“Pope Leo IV”, What's On This Date, https://whatsonthisdate.com/app/event/pope-leo-iv-847-april-10, 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 Pope Leo IV happen?

April 10 847 — 1179 years ago, on a Sunday.

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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