caption father predecessor successor succession house mother birth_place death_date death_place religion birth_date coronation spouse issue image article_title reign
john uther in 1582 . iii portraited by dutch artist johan baptista van gustav i of sweden eric xiv sigismund king of sweden house of vasa margaret leijonhufvud stegeborg castle 17 november 1592 stockholm castle lutheran 20 december 1537 10 july 1569 catherine jagellonica gunilla bielke sigismund , starosta of brodnica and golub john , duke of iii Östergötland '' sophia , baroness de la gardie '' -lrb- , ill . -rrb- king of poland and sweden anna john iii of sweden.jpg john iii of sweden
 30 september 1568 -- 17 november 1592
john iii of sweden

john iii -lrb- , -rrb- -lrb- 20 december 1537 -- 17 november 1592 -rrb- 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 .
