State · 911 – 1259

Duchy of Normandy

A state of 911 – 1259 — 348 years in Europe. It followed Kingdom of Brittany. The atlas records 3 things within it — wars and battles 1 · people 2. Its line of rulers holds 7 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: 348 years; 911 – 1259
Rulers: 7; the Duke of Normandy
Most ground: 39,200 km²; in 1066
Within it: 3; recorded rows
Symbol: 1; on record, with years

Map: Duchy of Normandy in 1066, its borders in gold among its neighbours — Duchy of Normandy in 1066, when it held the most ground the borders dataset draws for it: 39,200 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.

Duchy of Normandy in 922, 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.

Duchy of Normandy in 1066, 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.

Before it

Kingdom of Brittany · follows · 851 – 939

Rulers

Read from the state’s own English article and its rulers’ articles, where Wikidata names no ruler.

ending not on record

Ruler	Reign	Length	How it ended · source	To the ruler before
Rollo	911 – 927	16 years	ending not on record
Richard II of Normandy	996 – 1026	30 years	ending not on record
Robert I, Duke of Normandy	1027 – 1035	8 years	ending not on record	child
William the Conqueror	1035 – 1087	52 years	ending not on record	child
Robert Curthose	1087 – 1106	19 years	ending not on record	child
Geoffrey V of Anjou	1144 – 1150	6 years	ending not on record
John, King of England	1199 – 1204	5 years	ending not on record	grandchild

7 rulers, 7 with terms dated as terms, covering 911 – 1204. Median reign 16 years. 0 of 6 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.

35,300 km² in 936, 37,700 km² in 1061; at its largest 37,700 km² in 1011. 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.

coat of arms, undatedBlason Duché de Normandie · CC BY-SA 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.

900 – 9991 row

Richard II of Normandy · person · 963 – 1026

1000 – 10992 rows · 1 wars and battles

Odo of Bayeux · religious leader · 1030 – 1097
Battle of Mortemer · battle · 1054

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 stood348 years
stood longer than 77% of 3,187 states with a recorded end or still standing.
The most ground it held39,200 km²
held more ground at its peak than 31% 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 median16 years
had longer reigns, at the median, than 51% of 967 states whose dated line can carry a median.
Rulers on record7
has more rulers on record than 73% of 1,968 states with a line of rulers.

What led to it, and what came of it

The investigation's own picture: 2 causes the record names and 0 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.

in the articlelinked

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, 876 – 1294, with everything that stood beside it.
On the map in 1066, live: scrub the year and watch its borders move.
Investigate it: what led to it, what came of it, and its succession analysed.

Wikidata Q842091 (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.