Grabbacka, Medieval hillfort and château in Raseborg, Finland
Grabbacka is a medieval stone fortress in Raseborg with preserved vaulted basement sections and wall remains situated on a cliff above Gösbackaviken. The remains of the original defensive structure are still visible today as stone ruins and earthen fortifications.
In the late 15th century, Måns Andersson Grabbe received royal permission to build this stone fortress along the Stora Strandvägen route. The structure was part of the defensive works protecting this important trading passage.
The site shows how medieval fortifications were woven into the landscape and land use of that era, shaping the character of the region even today. Visitors can see how the original settlement fit into everyday life across these lands.
The site is located roughly 4 kilometers from Karis center and is accessible as an archaeological area. Visitors should be cautious when exploring the ruins, as uneven ground and remaining stone structures require careful footing.
The area beneath what is now agricultural land was once a navigable bay in prehistoric times, allowing direct sailing access from the sea to this location. This geographical shift reveals how dramatically the landscape has transformed over millennia.
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