 Orléansists and Unionists, Legitimists who recognise the Orléans as the rightful kings of France, do not consider Henri IV to be foreign because the Parlement of Paris ruled in 1505 that subjects of Béarn, where Henri was born in 1553, were French.In July 1593, Henry of Navarre decided to convert to Catholicism.The "Arrêt Lemaistre" enshrines the principle of Catholicity as intrinsic to the French monarchy and places it on the same footing as the fundamental laws that state the essential pillars of the French monarchy since no treaty present or future could contradict them without nullity.