State · 1185 – 1479

County Palatine of Cephalonia and Zakynthos

A state of 1185 – 1479 — 294 years in Europe. It replaced Byzantine Empire. It was replaced by Venetian rule in the Ionian Islands. The atlas records 6 things within it — people 6. Its line of rulers holds 12 people, 4 with dated terms.

Wikidata's English label: County palatine of Cephalonia and Zakynthos.

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

Stood: 294 years; 1185 – 1479
Rulers: 12; the Count palatine of Cephalonia and Zante
Most ground: 2,200 km²; in 1375
Within it: 6; recorded rows

Map: County Palatine of Cephalonia and Zakynthos in 1375, its borders in gold among its neighbours — County Palatine of Cephalonia and Zakynthos in 1375, when it held the most ground the borders dataset draws for it: 2,200 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.

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

Byzantine Empire · replaces · 285 – 1453

After it

Venetian rule in the Ionian Islands · replaced by

Rulers

The line of Count palatine of Cephalonia and Zante.

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
Richard Orsini	1250 – 1304	54 years	the term ends after the recorded deathread off the dates alone
John I Orsini	1303 – 1317	14 years	died in office, manner not recordedread off the dates alone	child
Nicholas Orsini	1317 – 1323	6 years	killedWikidata's manner of death	child
John II Orsini	1323 – 1325	2 years	left office aliveread off the dates alone	sibling

12 rulers, 4 with terms dated as terms, covering 1250 – 1325. Median reign 10 years. 2 of 3 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.

1,800 km² in 1365, 2,200 km² in 1405; at its largest 2,200 km² in 1375. 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.

1200 – 12994 rows

Nicholas Orsini · ruler · 1295 – 1323
Richard Orsini · ruler · 1230 – 1304
Matthew Orsini · ruler · 1200 – 1238
Matteo II Orsini · ruler · 1200 – 1300

1300 – 13992 rows

John I Orsini · ruler · 1300 – 1317
Leonardo I Tocco · ruler · 1310 – 1381

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 stood294 years
stood longer than 72% of 3,187 states with a recorded end or still standing.
The most ground it held2,200 km²
held more ground at its peak than 5% 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 median14 years
had longer reigns, at the median, than 46% of 967 states whose dated line can carry a median.
Rulers on record12
has more rulers on record than 84% 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 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.

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, 1156 – 1508, with everything that stood beside it.
On the map in 1375, live: scrub the year and watch its borders move.
Investigate it: what led to it, what came of it, and its succession analysed.

Wikidata Q149846 (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.