Assertion: capital's construction | /r/CapableOf | help improve helsinki's status
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text: The construction of the naval fortress Sveaborg (in Finnish Viapori, today also Suomenlinna) in the 18th century helped improve Helsinki's status, but it was not until Russia defeated Sweden in the Finnish War and annexed Finland as the autonomous Grand Duchy of Finland in 1809 that the town began to develop into a substantial city.