Most likely built in the years 1211-50, i.e. during the reign of Duke Henry the Bearded, this border stronghold’s location made it exceptionally difficult to capture, and also strategically important, as it was close to a number of key land and water trade routes. During the Mongol invasion on the Lower Silesia in 1241, the castle provided refuge for Duchess Hedwig. The castle was separated from the town by a wall and a moat. At the end of the 15th century, the reconstruction of the castle in Renaissance style was commenced. During the reign of Frederick II, it was turned into a military warehouse. By the end of the 18th century, the castle had lost importance, so in the years 1886-87, the Prussian army adapted it for barracks. In 1945, the Krosno castle burned down and subsequently turned into ruin. Reconstruction works did not begin until 1957 and have not been completed to this day.