About 1200 the original fortress Kasteln was built in the middle Schenkenberger valley, a few kilometers away from Schenkenberg Castle. In 1238 the castle is first mentioned in a deed of gift to the residents of the castle who were vassals of the Kyburgs. In 1262 Ruchenstein castle was built on the cliff directly behind the fort for the Knight of Ruchenstein. After the extinction of the Kyburg line in 1264, the castle came under the power of the House of Habsburg. Then in 1301 the Ruchenstein line died out, ten years after they had been given the fort as a gift by the Habsburgs. Both castles were acquired by the lords of Mülinen from Brugg. From here, they ruled over a small area on the southern edge of the Jura.
The castle belonged to the family of Mülinen until 1631 when Johann Ludwig von Erlach bought both castles. The Bernese patrician and general ordered the reconstruction of the castle in 1642 to a representative of manor house. Ruchenstein castle was demolished a year later and served as a building material supplier. Because the builder had no previous expertise, and the client was mostly absent, the conversion proved to be expensive and lasted until 1650. After about a century in the possession of the family of Erlach, in 1732 Bern bought the little bailiwick for 90,000 Taler.
After the fall of the Ancien Régime and the Act of Mediation in 1803, the bailiwick came into possession of the newly formed canton of Aargau. The castle was sold in 1836 to a private citizen. In 1855 the brothers Frederick and Louis Carnival of Aarau acquired the property and opened a 'rescue institution for orphans and neglected pupils' of the Reformed denomination. On 24 August 1907 one of the pupils set the castle and adjacent barn on fire. Both buildings suffered heavy damage and had to be rebuilt. It wasn't until 1909 that the Institute started operations in the manor again.
The Institute received the status of a foundation in 1923 and was converted in 1955 in a boarding school for students with behavioral problems. In 1969 next to the castle they built a second school building, swimming pool and a staff house. The entire castle was extensively renovated in 2009 inside and out and adapted to the current needs of the social education.
Kasteln is the only uniform baroque palace built in the Aargau. The current design is mainly due to the modifications under Johann Ludwig von Erlach. At the core is a four-story medieval castle with two-story wings, from 1642–50, to the east and west. The wings were built partly from material from the demolished castle Ruchenstein. The unusually rich interior of the castle in 1907 was lost in the fire.References:
The Palace of the Kings of Navarre of Olite was one of the seats of the Court of the Kingdom of Navarre, since the reign of Charles III 'the Noble' until its conquest by Castile (1512). The fortification is both castle and palace, although it was built more like a courtier building to fulfill a military function.
On an ancient Roman fortification was built during the reign of Sancho VII of Navarre (13th century) and extended by his successors Theobald I and Theobald II, which the latter was is installed in the palace in 1269 and there he signed the consent letter for the wedding of Blanche of Artois with his brother Henry I of Navarre, who in turn, Henry I since 1271 used the palace as a temporary residence. This ancient area is known as the Old Palace.
Then the palace was housing the Navarrese court from the 14th until 16th centuries, Since the annexation (integration) of the kingdom of Navarre for the Crown of Castile in 1512 began the decline of the castle and therefore its practically neglect and deterioration. At that time it was an official residence for the Viceroys of Navarre.
In 1813 Navarrese guerrilla fighter Espoz y Mina during the Napoleonic French Invasion burned the palace with the aim to French could not make forts in it, which almost brought in ruin. It is since 1937 when architects José and Javier Yarnoz Larrosa began the rehabilitation (except the non-damaged church) for the castle palace, giving it back its original appearance and see today. The restoration work was completed in 1967 and was paid by the Foral Government of Navarre.