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Suomenlinna
Begun 1748 under Swedish rule as Sveaborg, Suomenlinna is a UNESCO World Heritage sea fortress representing the fortification response to Russian pressure. Its fall in 1808 ended Swedish control of the key Baltic position and precipitated Russia's conquest of Finland — the military architecture of six fortified islands records the Swedish Great Power era's attempt to secure the Finnish coast. Anchor modes: custodian | material_layer | network_route | Search hooks: Suomenlinna; Sveaborg fortress; UNESCO sea fortress; 1748 Swedish fortification; Helsinki coastal defense; Baltic Fleet base
Ferry to the six fortified islands; walk military architecture spanning three centuries; visit the UNESCO World Heritage site; see the fortress that fell to Russia in 1808, ending Swedish Baltic control