Editors. "Marie de' Medici and the Duke of Orleans intrigue against Richelieu". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=16035, accessed 19 June 2013.]
Marie de' Medici, Queen Mother of France, and Gaston, Duke of Orleans, heir presumptive to the throne, intrigue against Louis XIII's chief minister Richelieu from their position of exile in Brussels.