Following the Peace of Westphalia , the Magdeburg territories had finally been secularized in 1680 as the Duchy of Magdeburg .
Following the Peace of Westphalia , the Magdeburg territories had finally been been given to Brandenburg - Prussia .
Following the Peace of Westphalia , the Magdeburg territories had finally been secularized in 1680 as the Duchy of Magdeburg and been given to Brandenburg - Prussia .