Their choice fell upon the 15 - year - old Johann Georg , son of the Elector of Brandenburg , Joachim III Frederick .
To hedge against this , the Protestants seized the episcopal offices and held their own election on 20 May to replace Manderscheid .
Protestants ' choice fell upon the 15 - year - old Johann Georg , son of the Elector of Brandenburg , Joachim III Frederick .
To hedge against this , the Protestants seized the episcopal offices and held their own election on 20 May to replace Manderscheid .