State · 1806 – 1866

Duchy of Nassau

A state of 1806 – 1866 — 60 years in Europe. It followed Pays réservé de Catzenellenbogen. It was followed by Kingdom of Prussia and Wiesbaden Government Region. Its own article says it was conquered by Hesse-Nassau.

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

Stood: 60 years; 1806 – 1866
Most ground: 16,800 km²; in 1809
Symbols: 2; on record, with years

Map: Duchy of Nassau in 1809, its borders in gold among its neighbours — Duchy of Nassau in 1809, when it held the most ground the borders dataset draws for it: 16,800 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 Nassau in 1809, 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.

Duchy of Nassau in 1864, last 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.

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

Pays réservé de Catzenellenbogen · follows

After it

Kingdom of Prussia · followed by · 1701 – 1918
Wiesbaden Government Region · followed by

How it ended, as its article says

Conquered by Hesse-Nassau, 1866. Read from the article's section “lead” by its grammar; the claim is only that the article says so.

After being occupied and annexed into the Kingdom of Prussia in 1866 following the Austro-Prussian War, it was incorporated into the Province of Hesse-Nassau.

One sentence of the English Wikipedia article, CC BY-SA 4.0.

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.

11,300 km² in 1806, 5,800 km² in 1856; at its largest 11,300 km² in 1806. 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 Nassau (1806-1866) · Public domain
coat of arms, undatedBlason Guillaume, duc de Nassau (1816-1839) · CC BY 3.0

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 stood60 years
stood longer than 37% of 3,187 states with a recorded end or still standing.
The most ground it held16,800 km²
held more ground at its peak than 19% 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.

What led to it, and what came of it

The investigation's own picture: 1 cause 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, 1796 – 1876, with everything that stood beside it.
On the map in 1809, live: scrub the year and watch its borders move.
Investigate it: what led to it, what came of it, and its succession analysed.

Wikidata Q836680 (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.