Svartholm sea fortress off Loviisa was completed in the mid-18th century. Svartholm was part of the same line of defence as Suomenlinna fortress off Helsinki. Swedish rule in Svartholm was quite short-lived as the fortress surrendered to the Russians almost without resistance in 1808.
- Well-preserved walls and embankments
- Shape and size of the sea fortress are easy to see
- Circle trail around the island
- Restaurant/café in summer
- Accessible by private boat, scheduled boat service or taxi boat
Activities and trails
What else is there to see
Visit the exhibition, explore the children's adventure tour, sea views and ruins
History of the Svartholma Sea Fortress
The Svartholma Sea Fortress was built in the mid-1700s to secure the new eastern border of the Kingdom of Sweden – it was an integral part of the realm's facade to the east.
History of the destinationVisitor's checklist
Camp only at permitted camping sitesCamping is only permitted in the immediate vicinity of designated rest and campfire sites, and huts.
Overnight at the cruise port is allowedYou may keep a boat in the excursion port for a maximum of 2 days.
Make campfires only in designated sitesAlways check the current wildfire warning before making a fire. During a wildfire warning, fires are only allowed in cooking shelters with a chimney.
Remember to bring a trash bagBring a trash bag and take the trash with you or to the recycling point.