First urban center of this part of Lesser Poland was located in Sieciechów, whose parish church controlled areas both east and west of the Vistula.
The town of Sieciechów (Castrum Sethei), judging by Gallus, was named after Sieciech (Setheus).
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He was born Kazimierz Łukoski in 1890, in the village of Sokół near Garwolin, in the Siedlce Governorate of the Russian Empire (in the Masovian Voivodeship of present-day Poland).
In 1998 Maria Wasiak became the final deputy-voivode of the Radom Voivodeship, before that region's amalgamation with others to form the Masovian Voivodeship as part of the Polish territorial divisions reforms in 1999.
Masovian Voivodeship, a present-day division of Poland, as well as other units existing after 1526
At first, it has been in the medieval city Sieciechów, but after the change of the Vistula river path, moved to a location where he stands to this day.
Sieciechów (Sytykhiv), a village in Lviv Oblast of western Ukraine;
It had a parish church of St. Lawrence, which controlled parishes of large parts of northern Lesser Poland, at such towns, as Kozienice, Stężyca, Dęblin, Zwoleń and Kazimierz Dolny.