State · 450 – 655

Kingdom of Deira

A state of 450 – 655 — 205 years in Europe. It was followed by Kingdom of Northumbria. The atlas records 9 things within it — wars and battles 2 · people 7. Its line of rulers holds 10 people.

For the full story, the article on Wikipedia (CC BY-SA 4.0); this page holds what the record says of the state.

Stood: 205 years; 450 – 655
Rulers: 10; the king of Deira
Most ground: 18,500 km²; in 633
Within it: 9; recorded rows

Map: Kingdom of Deira in 633, its borders in gold among its neighbours — Kingdom of Deira in 633, when it held the most ground the borders dataset draws for it: 18,500 km². Its neighbours wear their tints, as on the atlas's own map. Borders from Cliopatria (CC BY 4.0), coast and rivers from Natural Earth, cities from Reba, Reitsma & Seto 2016 (CC BY 4.0), each city under the name it bore that year.

Kingdom of Deira in 534, first mapped — The rise and the fall in one frame: the same ground at the years the borders dataset first maps it, maps it largest, and last maps it.

Kingdom of Deira in 633, at its largest — The rise and the fall in one frame: the same ground at the years the borders dataset first maps it, maps it largest, and last maps it.

Where it sits in time

Five thousand years, 3000 BCE to 2026; the state in gold, what it replaced or followed and what replaced or followed it in grey.

Before and after

The states the record files it as replacing or following, and those that replaced or followed it - Wikidata's own statements, each read from this state's side.

After it

Kingdom of Northumbria · followed by · 653 – 954

Rulers

The line of king of Deira - the office this state names as its head of state.

killed, executed or dead in battledied in officeleft alive by a regular roadending not on recorda second row: a reign that began before the last had ended — rival claimants, or a shared throne

Ruler	Reign	Length	How it ended · source	To the ruler before
Ælla of Deira	560 – 588	28 years	ending not on record
Æthelric of Deira	588 – 616	28 years	the term ends after the recorded deathread off the dates alone	child
Æthelfrith of Northumbria	604 – 616	12 years	died in battleWikidata's manner of death
Edwin of Northumbria	616 – 633	17 years	died in office, manner not recordedread off the dates alone
Osric of Deira	633 – 644	11 years	the term ends after the recorded deathread off the dates alone
Oswald of Northumbria	634 – 642	8 years	killed, the article saysread from the ruler's own article
Oswiu	642 – 644	2 years	left office aliveread off the dates alone	sibling
Oswine of Deira	644 – 651	7 years	died in office, manner not recordedread off the dates alone
Œthelwald of Deira	651 – 655	4 years	died in office, manner not recordedread off the dates alone
Alhfrith of Deira	654 – 664	10 years	ending not on record
Oswiu	654 – 670	16 years	died in office, manner not recordedread off the dates alone	parent
Alhfrith of Deira	656 – 664	8 years	ending not on record	child

10 rulers, 10 with terms dated as terms, covering 560 – 670. Median reign 10.5 years. 7 of 11 handovers irregular - a killing, a deposition, a rival claimant, a rising or a coup beside it. A blank in the last column means no kin on record, which is coverage, never “unrelated”.

Ground held, by year

km² inside its borders as the borders dataset draws them, measured on an equal-area grid; a step series, held between the years the dataset maps.

13,600 km² in 540, 13,100 km² in 610; at its largest 13,600 km² in 540. Cliopatria, CC BY 4.0.

What happened within it, by century

Every row the atlas hosts under this state, by the century it began in: wars and battles in red, risings, regime changes and massacres beside them, everything else in grey. A tall bar is a century the record is full for, which is partly a fact about Wikipedia.

500 – 5992 rows

Edwin of Northumbria · ruler · 586 – 633
Ælla of Deira · ruler · 501 – 588

600 – 6997 rows · 2 wars and battles

Oswiu · ruler · 612 – 670
Osric of Deira · ruler · 600 – 634
Æthelric of Deira · ruler · 600 – 604
Battle of Hatfield Chase · battle · 633
Œthelwald of Deira · ruler · 625 – 655
Oswine of Deira · ruler · 650 – 651
Battle of Catraeth · battle · 600

Among all states

Each measure against the states that carry it, never against all of them: a bar is the share of those states below this one.

How long it stood205 years
stood longer than 63% of 3,187 states with a recorded end or still standing.
The most ground it held18,500 km²
held more ground at its peak than 20% of 1,465 states with a border in Cliopatria.
Wars recorded per centurynone
had more wars on record per century than 44% of 3,187 states, counting the wars the atlas hosts under each.
How long a reign lasted, at the median11 years
had longer reigns, at the median, than 38% of 967 states whose dated line can carry a median.
Rulers on record10
has more rulers on record than 80% of 1,968 states with a line of rulers.

What led to it, and what came of it

The investigation's own picture: 0 causes the record names and 2 results, the strongest six of each at their own years, joined to the state by the kind of claim - a recorded statement solid, the article's sentence dashed, a theory dash-dot.

linked

Open the investigation: every row with its evidence, the conditions at the time, the theories condition by condition, and the succession analysed.

Open in the atlas

On the timeline, 429 – 676, with everything that stood beside it.
On the map in 633, live: scrub the year and watch its borders move.
Investigate it: what led to it, what came of it, and its succession analysed.

Wikidata Q506008 (CC0) · borders Cliopatria, CC BY 4.0 · coast and rivers Natural Earth · data built 2026-10-06 · Pastlas v2.9.1, by Oleh Voronko. The published atlas and its data are for non-commercial use.