Tunaborgen, Österskär, Sweden

Tunaborgen is a ruined former bishop castle. In 1291 Archbishop Nils Alleson mentioned a fortification on the site. The fort was also a strategic point in the Gustav Vasa's war against the Danes.

The ruins were rediscovered around 1920. The castle consisted of a square tower, a citadel, built together with an almost square walls and it was surrounded by a circular moat. Today the ground floor remains.

References:

Wikipedia

User Reviews

Laban Skraj (13 months ago)
Interesting reading on signs. Could be made nicer to visit. Free.

Katharina Lind (3 years ago)
Österåker municipality has brought in electricity, laid new floors and produced an exhibition by Elisabeth Ohlson inside the old medieval castle and it has become so nice and atmospheric. Guided tours on Sundays in September 2022. Photographer: Elisabeth Ohlsson

Andreas Lindberg (6 years ago)
Fun with information about the house and excavations. However, poorly stored. Only a bit of a stone wall is visible, then it's not that remarkable.

Ragna Engqvist (7 years ago)
Det ser inte så märkvärdigt ut. Men... Leta vidare i historien och Månghundraleden, vikingar, sjöstad och platsen har en stor betydelse

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