Uniejów Castle castle was built between 1360-1365 on the site of a former wooden fortress, destroyed after a raid by the Teutonic Knights in 1331. The initiator of the construction of the castle was Gniezno's Archbishop Jarosław Bogoria Skotnicki, one of the closest associates to Casimir III the Great.
The building was greatly expanded and modernised between 1525-1534, when after a fire most of the castle's Gothic characteristics had gone. The stronghold had ended's its militaristic significance in the seventeenth century, when the castle became a residence. In 1836 the castle was taken over by the House of Toll, an Estonian family. In 1848, Aleksander Toll had reconstructed the castle into a Classical architectural style. The castle in Uniejów is a prime example of accretion of architectural styles.References:
The Château du Haut-Koenigsbourg is situated in a strategic area on a rocky spur overlooking the Upper Rhine Plain, it was used by successive powers from the Middle Ages until the Thirty Years' War when it was abandoned. From 1900 to 1908 it was rebuilt at the behest of the German kaiser Wilhelm II. Today it is a major tourist site, attracting more than 500,000 visitors a year.
The first records of a castle built by the Hohenstaufens date back to 1147. The fortress changed its name to Koenigsburg (royal castle) around 1157. The castle was handed over to the Tiersteins by the Habsburgs following its destruction in 1462. They rebuilt and enlarged it, installing a defensive system designed to withstand artillery fire.
The fortification work accomplished over the 15th century did not suffice to keep the Swedish artillery at bay during the Thirty Years War, and the defences were overrun.