Fort di Capo Passero is located on a small island Isola di Capo Passero. It was commissioned in 1599 by the crown of Spain. Developed by Giovanni Antonio del Nobile, a German-sicilian architect, the fort was built to combat the dangers of severe and violent pirate activity in the Mediterranean region. Throughout the years, the fort remained a highly sought after naval resource as it was the guardian of the entrance to Europe. Whoever controlled the fort was considered to control the entrance to Europe.
During the 18th century the fort was used as a military prison. However on December 30, 1866 a Royal Decree halted military prison activity in the fort. In 1871 a lighthouse was built in the terrace of the fort, which was operated by the Italian Navy until it was fully decommissioned in the late 1950s.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.