State · 400 – 927

Kingdom of Dumnonia

A state of 400 – 927 — 527 years in Europe. Its line of rulers holds 1 person.

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

Stood: 527 years; 400 – 927
Rulers: 1; the monarch
Most ground: 14,300 km²; in 602
Symbol: 1; on record, with years

Map: Kingdom of Dumnonia in 602, its borders in gold among its neighbours — Kingdom of Dumnonia in 602, when it held the most ground the borders dataset draws for it: 14,300 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.

Where it sits in time

Five thousand years, 3000 BCE to 2026; the state in gold.

Rulers

The line of monarch.

Ruler	Reign	Length	How it ended · source	To the ruler before

1 rulers, 0 with terms dated as terms. 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.

14,300 km² in 625, 14,300 km² in 700; at its largest 14,300 km² in 625. Cliopatria, CC BY 4.0.

Flag or arms

Each symbol with the years its own statement gives; the timeline flies the one of the year on screen.

flag, undatedFlag of Cornwall · Public domain

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 stood527 years
stood longer than 88% of 3,187 states with a recorded end or still standing.
The most ground it held14,300 km²
held more ground at its peak than 18% 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.
Rulers on record1
has more rulers on record than 13% of 1,968 states with a line of rulers.

Open in the atlas

On the timeline, 347 – 980, with everything that stood beside it.
On the map in 602, live: scrub the year and watch its borders move.
Investigate it: what led to it, what came of it, and its succession analysed.

Wikidata Q313136 (CC0) · borders Cliopatria, CC BY 4.0 · coast and rivers Natural Earth · symbols from Wikimedia Commons, each credited above · data built 2026-10-06 · Pastlas v2.9.1, by Oleh Voronko. The published atlas and its data are for non-commercial use.