The Citânia de Santa Luzia (also known as the Old City of Santa Luzia) is an archaeological site of the Castro culture. Its construction dates from the Iron Age, and it shows evidence of occupation during the Roman period. The Castro was first dug in 1876 by Joaquim Possidonio Narciso da Silva. Only about one third of the structures have been dug, with the remaining part being under or destroyed during the construction of the nearby hotel (1900 - c. 1910), church (1904 - 1943), and respective roads. The site also included a possibly medieval chapel dedicated to Saint Lucy which persisted, after some reconstructions, until 1926 when it was destroyed to give way to the Saint Lucy Church of Miguel Ventura Terra.
The Citânia was constructed on the top of the Santa Luzia hill, overseeing the Lima River's delta and is protected by three lines of walls, towers, and two moats. The innermost walls (1.20 to 1.25 in thickness) enclose a 30m by 20m area that contains a single circular house and its only entrance faces West.
Ruins of approximately 74 houses have been found. Most of them have circular foundations or elliptical, and few are rectangular. The houses are found within small, walled neighborhoods.
The findings of the Citânia de Santa Luzia include multiple ceramics of the Castro, Roman, and Visigothic eras.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.