State · 1815 – 1918
Duchy of Brunswick
A state of 1815 – 1918 — 103 years in Europe. It replaced Principality of Brunswick-Wolfenbüttel and followed Duchy of Brunswick-Lüneburg. It was replaced by Free State of Brunswick. The atlas records 1 thing within it — people 1. Its line of rulers holds 1 person. Its own article says it was dissolved.
For the full story, the article on Wikipedia (CC BY-SA 4.0); this page holds what the record says of the state.
- Stood
- 103 years
- 1815 – 1918
- Rulers
- 1
- the Head of the House of Hanover
- Most ground
- 4,800 km²
- in 1820
- Within it
- 1
- recorded row
- Symbols
- 3
- on record, with years
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
- Principality of Brunswick-Wolfenbüttel · replaces · 1269 – 1815
- Duchy of Brunswick-Lüneburg · follows · 1235 – 1806
After it
- Free State of Brunswick · replaced by
How it ended, as its article says
Dissolved. Read from the article's section “lead” by its grammar; the claim is only that the article says so.
It was disestablished after the end of World War I, its territory incorporated into the Weimar Republic as the Free State of Brunswick.
One sentence of the English Wikipedia article, CC BY-SA 4.0.
Rulers
Read from the state’s own English article and its rulers’ articles, where Wikidata names no ruler.
| Ruler | Reign | Length | How it ended · source | To the ruler before |
|---|---|---|---|---|
| Frederick William, Duke of Brunswick-Wolfenbüttel | 1813 – 1815 | 2 years | killed, the article saysread from the ruler's own article |
1 rulers, 1 with terms dated as terms, covering 1813 – 1815. Only 2 years of the line are dated - too short for a median. 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.
4,200 km² in 1815, 4,700 km² in 1865; at its largest 4,800 km² in 1825. Cliopatria, CC BY 4.0.
Flags and arms, in order
Each symbol with the years its own statement gives; the timeline flies the one of the year on screen.

flag, undatedFlagge Herzogtum Braunschweig · Public domain 
coat of arms, undatedBrunswijk wapen · Public domain 
coat of arms, undatedCoat of Arms of the Duchy of Brunswick · CC BY-SA 4.0 · Glasshouse
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.
1800 – 18991 row
- Alexander von Linsingen · commander · 1850 – 1935
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 stood103 years
stood longer than 47% of 3,187 states with a recorded end or still standing.
- The most ground it held4,800 km²
held more ground at its peak than 9% 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.
What led to it, and what came of it
The investigation's own picture: 4 causes the record names and 1 result, 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.
Open the investigation: every row with its evidence, the conditions at the time, the theories condition by condition, and the succession analysed.
Theories that apply to its ending
Of 3 theories of why states fall, 1 has every condition present at this ending; each is applied by its own logic, condition by condition, and whether its authors named this case is a footnote.
Dynastic cycle and the decay of group feeling
Ibn Khaldun 1377 · Turchin & Nefedov 2009
Applies by its own logic: the condition it names held here, and this is the kind of outcome it predicts — adverse regime change or the state's ending.
- the state 90 to 160 years old — ageBand 103
Open in the atlas
- On the timeline, 1805 – 1928, with everything that stood beside it.
- On the map in 1820, live: scrub the year and watch its borders move.
- Investigate it: what led to it, what came of it, and its succession analysed.
Wikidata Q326029 (CC0) · borders Cliopatria, CC BY 4.0 · coast and rivers Natural Earth · symbols from Wikimedia Commons, each credited above · one sentence of the English Wikipedia article, CC BY-SA 4.0 · data built 2026-10-06 · Pastlas v2.9.1, by Oleh Voronko. The published atlas and its data are for non-commercial use.