Editors. "Crown treaty recognises the Elector of Brandenburg as King of Prussia". The Literary Encyclopedia. First published 01 April 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=16986, accessed 17 April 2014.]
A crown treaty between the Holy Roman Emperor and the Elector of Brandenburg recognises the latter as King of Prussia, on the condition that he will provide military assistance for the imminent war against France, will support the Austrian Habsburgs in Imperial elections, and will support the Hapsburg family when voting in the Diet.