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The city of Helsinki, Finland (belonging to Sweden at the time) is founded by King Gustav I of Sweden.
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Helsinki
Capital and most populous city of Finland
Helsinki is the capital and most populous city in Finland. It is on the shore of the Gulf of Finland and is the seat of southern Finland's Uusimaa region. About 690,000 people live in the municipality, with 1.3 million in the capital region and 1.6 million in the metropolitan…Source: Wikipedia (CC BY-SA)
Gustav Vasa
King of Sweden from 1523 to 1560
Gustav Eriksson Vasa, also known as Gustav I, was King of Sweden from 1523 until his death in 1560. He was previously self-recognised Protector of the Realm (Riksföreståndare) from 1521, during the ongoing Swedish War of Liberation against King Christian II of Denmark, Norway…Source: Wikipedia (CC BY-SA)