Built in the 12th century in mudejar style, the Castilnovo castle is conserved in good condition. It has a rectangular plan, with six round and square towers. It was rebuilt in the 14th - 16th centuries and again between the 19th and the 20th centuries. The present castle is thought to have been built on a previous structure, probably a small fortress. Trapezoid ground plan, with six round and rectangular turrets of brick and masonry. Arched, parted windows. Rectangular turrets, one if which leads inside the building.
Particularly noteworthy is a corner turret reminiscent of another turret in Monteagudo de las Vicarías. The main features of the building are 14th century.The southern section, with its wooden gallery, dates back to 1861, and the present stone yard was built in the 20th century.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.