John III, king of Sweden (died 1592)

John III was King of Sweden from 1569 until his death. He attained the Swedish throne after a rebellion against his half-brother Erik 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.

December 20 is the 354th day of the year in the Gregorian calendar; 11 days remain until the end of the year.