Editors. "Pope Clement VII surrenders to the imperialists". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14381, accessed 20 April 2014.]
In Rome, Pope Clement VII is forced to surrender to the marauding imperialist troops. He agrees to pay an enormous ransom of 400 000 ducats if his life is spared, as well as ceding to the Holy Roman Empire the territories of Parma, Piacenza, Civitavecchia and Modena.