Editors. "Union of Frankfurt between Prussia, Bavaria, the Palatinate and Hesse". The Literary Encyclopedia. First published 01 April 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=17495, accessed 11 December 2013.]
Frederick of Prussia, Charles of Bavaria, the Elector Palatine, and the Landgrave of Hesse, form the Union of Frankfurt. This aim of this concerted action is to force Maria Theresa to restore Bavaria, make peace and restore the constitution of the Holy Roman Empire.