noble_family john iii of sweden
The ___MASK16___ was an early modern royal house founded in 1523 in Sweden , ruling Sweden 1523  1654 , the Polish - Lithuanian Commonwealth 1587  1668 and the Tsardom of Russia 1610  1613 ( titular until 1634 ). Its agnatic line became extinct in Poland with the death of King John II Casimir of Poland in 1672 . The ___MASK90___ , the current royal house of Sweden , has reigned since 1818 . Between 1818 and 1905 , it was also the royal house of Norway . Its founder , Charles XIV John of Sweden ( who was born Jean Bernadotte ), was adopted by Charles XIII of Sweden , whose House of Holstein - Gottorp was becoming extinct . John III ( Swedish : Johan III , Finnish : Juhana III ) ( 20 December 1537 -- 17 November 1592 ) was King of Sweden from 1568 until his death . He was the son of King Gustav I of Sweden and his second wife Margaret Leijonhufvud . He was also , quite autonomously , the ruler of Finland , as Duke John from 1556 to 1563 . In 1581 he assumed also the title Grand Prince of Finland . Gustav I , born Gustav Eriksson of the Vasa noble family and later known as Gustav Vasa ( 12 May 1496  29 September 1560 ), was King of Sweden from 1523 until his death in 1560 , previously self - recognised Protector of the Realm (" Riksföreståndare ") from 1521 , during the ongoing Swedish War of Liberation against King Christian II of Denmark , Norway and Sweden . Initially of low standing , Gustav rose to lead the rebel movement following the Stockholm Bloodbath , in which his father perished . Gustav ' s election as King on 6 June 1523 and his triumphant entry into Stockholm eleven days later meant the end of Medieval Sweden ' s elective monarchy and the Kalmar Union , and the birth of a hereditary monarchy under the ___MASK16___ and its successors , including the current House of Bernadotte .