Joachim II, Elector of Brandenburg, converts to Protestantism. When, later in the year, Duke George of Saxony dies and his Lutheran younger brother Henry accedes to the duchy, northern Germany becomes almost entirely Protestant: all the states except Brunswick have adopted the Reformation.
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Citation: Editors, Litencyc. "Joachim II, Elector of Brandenburg, becomes a Protestant". The Literary Encyclopedia. First published 01 November 2010 [https://www.litencyc.com/php/stopics.php?rec=true&UID=14615, accessed 09 June 2026.]
