Coat of arms Szembek Role Diplomat Consort Ewa Leszczynska Died 1945, Estoril, Portugal | Family Szembek Education University of Vienna Name Jan Szembek | |
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Count Jan Sebastian Szembek (?-1731) was a Polish szlachcic.

Recorder of the Crown since 1699, Deputy Chancellor of the Crown in 1703-1711, Grand Chancellor of the Crown since 1712. Starost of Łomża
Marshal of the Sejm (zwyczajnego) on December 22, 1701 - February 6, 1702.
References
Jan Szembek Wikipedia(Text) CC BY-SA