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About Konstancja Poniatowska
Princess Konstancja Poniatowska (1759–1830) was a Polish noblewoman from the House of Poniatowski. She was also the niece of King Stanisław August Poniatowski.
Everything about Konstancja Poniatowska →- Citizenship
- Polish–Lithuanian Commonwealth
- Born
- March 2, 1759
- Died
- April 28, 1830