At what was to be the height of his power, Holy Roman Emperor
Charles V met with the Diet of Augsburg and proposed constitutional
reforms that would strengthen the executive of the Empire. He also
tried to persuade Pope Paul III to bring the general Church council
back from Bologna to Trent, which was eventually successful, though
not until four years later.
Citation:
Editors. "Charles V proposes strengthening imperial executive".
The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14769, accessed 26 May 2013.]