Janusz I of Warsaw
Polish noble · Poland · On the map · Historical Figures · Lived 1347 to 1429 · aged 82
Janusz I of Warsaw, also known as Janusz I the Old, was a Polish prince member of the House of Piast in the Masovian branch, from 1373/74 Duke of Warsaw and after the division of the paternal inheritance between him and his brother in 1381, ruler over Nur, Łomża, Liw, Ciechanów, Wyszogród and Zakroczym.
Janusz I of Warsaw is read about 71 times a day, in 12 languages.
A typical day, 30 days to 15 October 2026
The middle day of the days counted, so one week of news cannot move it. The line under it is the last 117 days, one point a day.
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In addition, he was a vassal of the Polish Kingdom since 1391 for the fief of Podlachia.
