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Siemowit VI of Masovia
POlish noble · Lived 1446 to 1462 · aged 15
Siemowit VI of Płock, was a Polish prince member of the House of Piast from the Masovian branch. He was a Duke of Płock, Rawa Mazowiecka, Belz, Płońsk, Zawkrze and Wizna during 1455-1461/62 jointly with his brother, since 1459 ruler over Gostynin.
Siemowit VI of Masovia is read about 6 times a day, in 9 languages.
A typical day, 30 days to 18 August 2026
The middle day of the days counted, so one week of news cannot move it. The line under it is the last 60 days, one point a day.
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Status
Deceased
Dates
Lived 1446 to 1462 · aged 15