Hamina häˈmĭnä [key], Swed. Fredrikshamn, city, South Finland prov., SE Finland, on the Gulf of Finland. Hamina is an important port. Timber and wood products are exported. Originally named Veckelaks, it was a noted trade center in the Middle Ages. The Treaty of Fredrikshamn (1809), by which Sweden ceded all of Finland to Russia, was signed in Hamina.

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