The Tree of Europe · Person

Stanisław II August Poniatowski

He attempted to reform the Polish–Lithuanian Commonwealth under intense foreign pressure. The partitions and the defeat of constitutional projects brought his monarchy to an end.

1732 – 1798KingPoniatowski · ES

Explore this family · Spanish Atlas Back to people

This complete profile is available in English. Bibliographic titles retain their original language. Links marked ES open the Spanish edition.

Historical profile

Key details

Birth: 17 January 1732 Documented

Death: 12 February 1798 Documented

Role: King

Dynasty: Poniatowski · ES

Territories: Poland (ES) · Lithuania (ES)

Recorded governments and reigns

King · Poland · Reign Pending review1764–1795Effective rule

Grand duke · Lithuania · Grand duchy Pending review1764–1795Effective rule

Family network

Recorded relationships

Parents

Stanisław Poniatowski · ESDocumentedKonstancja Czartoryska · ESPending review

Crowns and unions

Their titles over time

Follow the changing territories and offices of Stanisław II August Poniatowski. Each title retains its own status.

Period

Governments in 1764

Polish–Lithuanian Commonwealth2 titles and offices
View titles and jurisdictions
- Poland · ESKing · Effective rule1764–1795
- Lithuania · ESGrand duke · Effective rule1764–1795
The Union of Lublin of 1569 created a commonwealth with a shared monarch and parliament. The Crown and Grand Duchy retained their titles and institutions; Courland and Ducal Prussia thereby did not become provinces of the Crown. Source for this grouping

Annual dates: overlap within one year does not prove that two offices were held on the same day. Regencies and co-rulerships retain their labels.

Documentation

Sources for this profile

Biographical and contextual references in their original language. Sources and methodology.

Evidence for this profile

6 recorded claims · 3 without a claim-specific source. Context references do not by themselves verify every fact.

Dates (2/2 with a precise source)

BirthDocumented
17 January 1732
The authority record gives the birth as 1732-01-17.
Deutsche Nationalbibliothek · GND · Stanisław August II., Polen, König · Vital data: birth date
Reviewed on 2026-10-17 by El Árbol de Europa ·
DeathDocumented
12 February 1798
The authority record gives the death as 1798-02-12.
Deutsche Nationalbibliothek · GND · Stanisław August II., Polen, König · Vital data: death date
Reviewed on 2026-10-17 by El Árbol de Europa ·

Family and relationships (1/2 with a precise source)

FatherDocumented
Stanisław Poniatowski
The authority record identifies Stanisław Poniatowski (GND 141224967) as father.
Deutsche Nationalbibliothek · GND · Stanisław August II., Polen, König · Relationships: father → GND 141224967
Reviewed on 2026-10-17 by El Árbol de Europa ·
MotherPending review
Konstancja Czartoryska
A precise source has not yet been added.
No individual review recorded ·

Governments (0/2 with a precise source)

GovernmentPending review
King · Poland · 1764–1795
A precise source has not yet been added.
No individual review recorded ·
GovernmentPending review
Grand duke · Lithuania · 1764–1795
A precise source has not yet been added.
No individual review recorded ·

Biographical and contextual references (2)

Editorial history

2026-10-12 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
2026-10-08 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
2026-10-04 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
2026-10-04 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
2026-10-03 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
2026-09-30 · The duchy is limited to Dijon and Autun; each other fief now enters the map only under its dated ruler. John III of Namur and the Nevers/Rethel branch were added. The previous shape combined later counties and unrelated lands as if all belonged to the duchy from 1363.
2026-09-28 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.