John II Casimir Vasa
King of Poland and Grand Duke of Lithuania (1648–1668)
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Updated 2026-05-29
Polish-Lithuanian king who spent 20 years fighting Swedes, Russians, and Cossacks before throwing in the towel in 1668. Son of Sigismund III, he inherited a throne already bleeding resources and never quite stopped the bleeding.
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John II Casimir Vasa was King of Poland and Grand Duke of Lithuania from 1648 to his abdication in 1668 as well as a claimant to the throne of Sweden from 1648 to 1660. He was the first son of Sigismund III Vasa with his second wife Constance of Austria. John Casimir succeeded his older half-brother, Władysław IV Vasa.
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Stable14.9
Composite of search demand, mentions, audience & graph footprint.
Score components
Momentum1.4
Historical20.6
Source confidence60.0
Completeness60.0
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- WikipediaHigh confidencewikipedia · en.wikipedia.org
- WikidataHigh confidencewikidata · wikidata.org
- Pantheon 2.0High confidencedatabase · pantheon.world
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