events
Swedish regent Gustav Vasa is elected King of Sweden and, marking a symbolic end to the Kalmar Union, 6 June is designated the country's national day.

Related Wikipedia articles
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)
Monarchy of Sweden
The monarchy of Sweden is centred on the monarchical head of state of Sweden, by law a constitutional and hereditary monarchy with a parliamentary system. There have been kings in what now is the Kingdom of Sweden for more than a millennium. Originally an elective monarchy, it…Source: Wikipedia (CC BY-SA)
Kalmar Union
Personal union in Scandinavia
The Kalmar Union was a personal union in Scandinavia, agreed at Kalmar in Sweden as designed by Queen Margaret of Denmark. From 1397 to 1523, it joined under a single monarch the three kingdoms of Denmark, Sweden, and Norway, together with Norway's overseas colonies.Source: Wikipedia (CC BY-SA)
June 6
Day of the year
June 6 is the 157th day of the year in the Gregorian calendar; 208 days remain until the end of the year.Source: Wikipedia (CC BY-SA)