Bullerborg, Medieval fortification in Imatra, Finland
The fortified castle stands on an island in the Vuoksi River, positioned upstream from the Imatrankoski rapids in southeastern Finland.
King Gustav Vasa authorized the construction of Bullerborg in 1547 as part of a defense strategy against potential Russian expansion.
The fortress represents a period of Finnish military architecture when border fortifications were essential for maintaining territorial control in the region.
The original location of Bullerborg now lies submerged beneath the reservoir of the Imatra hydroelectric power station near Pässiniemi.
Mentioned in Vyborg Castle's accounting books from 1555 to 1557, the fortress served as a salmon fishing station under the castle's administration.
Location: Imatra
GPS coordinates: 61.04500,28.92722
Latest update: October 24, 2025 20:10
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