Sierpc

Sierpc is an old town of Płock Mazovia. Once a possession of the bishops of Płock, it came under the Masovian dukes, and Duke Wacław of Płock established it under town law in 1322. A great fire in 1389 was followed by a renewal of its privileges. After the death of Duke Janusz II in 1495, Płock Mazovia was incorporated into the Polish Crown and Sierpc became a county seat. Its churches and market served a district of villages and estates in northern Mazovia.