Siemiatycze is a town in eastern Poland, with 15,209 inhabitants. It is situated in the Podlaskie Voivodeship; previously it was in Białystok Voivodeship. It is the capital of Siemiatycze County.
The history of Siemiatycze dates back to the mid-16th century, when the village was part of the Podlasie Voivodeship of the Grand Duchy of Lithuania. In 1542, King Sigismund II Augustus granted town charter to Siemiatycze, and with the 1569 Union of Lublin, it became part of the Polish–Lithuanian Commonwealth.
For centuries Siemiatycze remained property of several Polish-Lithuanian magnate families. The town, conveniently located along the Bug River, and near local administrative centers at Drohiczyn and Mielnik, became a popular market place, where farmers sold their produce.
Wikipedia https://en.wikipedia.org/wiki/Siemiatycze
Coordinates 52°25'40.432" N 22°51'45.813" E