Castle Caladan was the official residence of the ruling clan of planet Caladan.
It was an ancient structure, made of very old stone and wood, and was characterised by many rooms and halls, as well as vaulted ceilings with patterned wooden beams. On the Western Continent of the planet, it stood by a great river and farmland owned by House Atreides. Various rooms within the castle held views of river orchards, Cala City, and Mount Syubi.
Its Dining Hall was the scene of many lush meals presided over by the Atreides Duke, and was the home of House Atreides for twenty-six generations, until the Atreides, under the rule of Duke Leto the Just, the 20th Atreides Duke, were ordered to take over the planetary fief of Arrakis in 10191 AG. Presumably, after The Lady Jessica returned to Caladan after her son Paul ascended to the Imperial Throne, she resided in Castle Caladan with Gurney Halleck.
During the Time of KralizecEdit
Five thousand years after the Ascension of House Atreides, and after the Atreides family had permanently left Caladan; the castle, which had fallen into ruins, was re-built by the Enhanced Face Dancer leader, Khrone.
Khrone used the Castle as his headquarters to produce his back-up Ultimate Kwisatz Haderach project, a clone of Paul Atreides, named Paolo, whom he had trained by a ghola of the Baron Vladimir Harkonnen. Khrone had the Castle re-created as close to the original as possible, to produce the correct memories of the desire for revenge in Harkonnen; and genuine memories in Paolo.
As Paolo was raised by Vladimir into his second decade, Harkonnen ensured that Paolo was the opposite of the original Paul Atreides; by crafting Paolo's personality as arrogant, betraying, and paranoid. The Castle was near-abandoned by Khrone when Harkonnen and Paolo were permanently summoned away from Caladan, to have Paolo's training completed by the Thinking Machine rulers, Omnius and Erasmus.
After the Day of KralizecEdit
After the death of Khrone, the mass killing of all Face Dancers by Erasmus, and the bright future of man/machine cooperation under the duidance of Duncan Idaho, Castle Caladan was again occupied. A ghola of Jessica Atreides, with her friend companion Dr Welling Yueh, made the Castle their home, as Jessica awaited the birth of the ghola of her former husband, Leto I.