Castillo de Bujalance was built in the 10th century during the Caliphate of Abd-ar-Rahman III. It is a clear example of Muslim military architecture in Al-Andalus. It subsequently underwent several modernizations, most recently in 1512, which were paid for by Queen Joanna of Castile.
It is rectangular in shape, measuring 59 metres north-south and 51 metres east-west. The castle's original name, 'tower of the snake', and the fact that it had seven towers, led to the current name of the city and its coat of arms. In 1963, the Ministry of Culture declared the site a Bien de Interés Cultural monument. Currently, its courtyard is used as a cultural space, which is in the process of being cataloging, restored and reconstructed. Highlights include the Festival of Theatre, Music and Dance (Nights at the Citadel) and Andalusian Dinner during the summer months.References:
First record of Kastelholma (or Kastelholm) castle is from the year 1388 in the contract of Queen Margaret I of Denmark, where a large portion of the inheritance of Bo Jonsson Grip was given to the queen. The heyday of the castle was in the 15th and 16th centuries when it was administrated by Danish and Swedish kings and stewards of the realms. Kastelhoma was expanded and enhanced several times.
In the end of 16th century castle was owned by the previous queen Catherine Jagellon (Stenbock), an enemy of the King of Sweden Eric XIV. King Eric conquered Kastelholma in 1599 and all defending officers were taken to Turku and executed. The castle was damaged under the siege and it took 30 years to renovate it.
In 1634 Åland was joined with the County of Åbo and Björneborg and Kastelholma lost its administrative status.