Suomenlinna, until 1918 Viapori, (Finnish), or Sveaborg (Swedish), is
Turku Castle (Finnish: Turun linna, Swedish: Åbo slott) is a monument
Häme Castle (Hämeen linna in Finnish, Tavastehus slott in Swedish) i
The Raseborg Castle (Finnish: Raaseporin linna, Swedish: Raseborgs
Kuusisto Castle (Swedish: Kustö slott) was a medieval episcopal
Kastelholm Castle (Kastelholms slott in Swedish) is a medieval castle
The Kajaani castle (Finnish: Kajaanin linna, Swedish: Kajaneborg,
Ruotsinsalmi sea fortress is a fortification system in Kotka, Finland.
Oulu Castle (Uleåborgs slott in Swedish, Oulun linna in Finnish) was
The Svartholm fortress (Svartholman merilinnoitus in Finnish and
Junkarsborg was a medieval castle in Karis, Finland. Today only
Olavinlinna (svenska. Olofsborg; literally St. Olaf's Castle) is a
