XIV century defensive castle which was built by King Kazimierz Wielki in the south-east border of this mediaeval city. Monumental Gothic building, which was visited by polish Kings: Władysław Jagiełło and Kazimierz Jagiellończyk, was rebuilt in the Renaissance style in the XVI century by Jan Lutomirski – the diplomat, treasurer and votary of reformation in Poland during the reign of Zygmunt August. The XIX century Prussian “powder-magazine” is the remainder of Polish Republic decline. The castle, which before 1939 was almost completly destroyed, was rebuilt between 1964-1975.