Siewierz

In history, Sewerien was first mentioned in 1125, which was administered by the Castellan of Bytom. In 1177, Casimir II granted Sewerien to Mieszko IV Tanglefoot duke of Silesia and Racibórz, together with the duchy of Bytom. The town became a seat of a separate castellan by the beginning of the 13th century. In 1241, the Mongols burned the city, and razed the fort to ground.

In 1276, Siewierz received city status. On 26 February 1289, in front of the city gates of Siewierz, the allied forces of Władysław I the Elbow-high, then Duke of Kujawy and Mazovia, the future King of Poland, defeated the army of Henryk IV Probus, duke of Wrocław andKraków. Henryk IV Probus accepted vassalage and protection from the Bohemian king, Wenceslaus II. He was the first Piast Silesianduke to become Bohemian vassal, leading to Bohemian annexation of most Silesia in the coming years.