John III (Swedish: Johan III, Finnish: Juhana III; 20 December 1537 – 17 November 1592) was King of Sweden from 1569 until his death. He attained the Swedish throne after a rebellion against his half-brother Eric XIV. He is mainly remembered for his attempts to close the gap between the newly established Lutheran Church of Sweden and the Catholic Church, as well as his conflict with and possible murder of his brother. He was also, quite autonomously, the Duke of Finland from 1556 to 1563. In 1581 he assumed the title Grand Prince of Finland.
https://en.wikipedia.org/wiki/John_III_of_Sweden
John III (Swedish: Johan III, Finnish: Juhana III; 20 December 1537 – 17 November 1592) was King of Sweden from 1569 until his death. He attained the Swedish throne after a rebellion against his half-brother Eric XIV. He is mainly remembered for his attempts to close the gap between the newly established Lutheran Church of Sweden and the Catholic Church, as well as his conflict with and possible murder of his brother. He was also, quite autonomously, the Duke of Finland from 1556 to 1563. In 1581 he assumed the title Grand Prince of Finland.
