Oulu Castle

The Russian Sophia Chronicle has recorded that men from Novgorod tried to conquer a new castle in the Oulu River delta in 1377 but were unsuccessful.

The present-day ruins on the Linnansaari island remain from an even later castle, which was built in 1605 by order of King Charles IX.

According to the order, the old wooden structures had to be demolished and a rampart with fire shelters had to be built around the island.

[2] The castle was badly damaged in 1715, when Russian forces burned it during the Great Northern War.

Wooden constructions on the remaining powder magazine date from 1875 when the Oulu School of Sea Captains built their observatory on the site.