Editors. "Archduke Ferdinand is empowered to settle the religious question". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14911, accessed 19 May 2013.]
Holy Roman Emperor Charles V, nearing the end of his stamina for the task of ruling his many kingdoms, grants his brother Ferdinand the authority to meet with the German diet to settle the question of religion.