Editors. "William of Cleves, a Lutheran, succeeds to the duchy of Gelders". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14616, accessed 22 May 2013.]
In the Netherlands province of Guelders, the estates recognise the claim of Lutheran Duke William of Cleves to their duchy. This further embarrasses Charles V, whose dominions seem to be all too rapidly turning to Protestantism in spite of his efforts to the contrary.