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Helsinki - Wikipedia
Helsinki | Finland, Map, Population, & History | Britannica
Helsinki - Simple English Wikipedia, the free encyclopedia
History of Helsinki - Wikipedia
Helsinki – Travel guide at Wikivoyage
History of Helsinki in a nutshell | My Helsinki
About the city | Welcome Helsinki | City of Helsinki
Discover Helsinki, the capital of Finland | Visit Finland
Helsinki/Central – Travel guide at Wikivoyage
Timeline of Helsinki - Wikipedia