Gävle Castle is the northest one of so-called Vasa castles, built by Gustav Vasa of Sweden or his sons. The construction started in 1583 by the religious King John III of Sweden. The design was made by Willem Boy and the center of castle was a chapel. The castle was completed in 1597, five years after John's death.
In 1727 the chapel and the top floor were destroyed by fire. Gävle castle stayed damaged until 1741, when it was agreed to rebuilt. The current appearance dates from the design made by Carl Hårleman. In 1754 the reconstruction was complete.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.