Orléanist (Orléaniste) was a 19th-century French political label originally used by those who supported a constitutional monarchy expressed by the House of Orléans. Due to the radical political changes that occurred during that century in France, three different phases of Orléanism can be identified:
The "pure" Orléanism: constituted by those who supported the constitutional reign of Louis Philippe I (18301848) after the 1830 July Revolution, and who showed liberal and moderate ideas.
The "fusionist" (or "unionist") Orléanism: the movement formed by pure Orléanists and by those Legitimists who after the childless death of Henri, Count of Chambord in 1883 endorsed Philippe, Count of Paris, grandson of Louis Philippe, as his successor. The fusion drove the Orleanist movement to more conservative stances, emphasising French nationality (rejecting claims to France of the Spanish Bourbons on account of their "foreigness") and Catholicism.
The "progressive" Orléanism: the majority of "fusionists" who, after the decline of monarchist sentiment in the 1890s, joined into moderate republicans, who showed progressive and secular-minded goals, or into Catholic rally, like the Liberal Action.
Orleanism was opposed by the two other monarchist trends: the more conservative Legitimism that was loyal to the eldest branch of the House of Bourbon after 1830, and the Bonapartism that supported Napoleon’s legacy and heirs.
July Monarchy
On 26 July 1830, the revolution of the so-called Three Glorious Days (or July Revolution) erupted due to the authoritarian and anti-Gallican tendencies showed by Charles X and his Prime Minister Jules de Polignac, expressed by the recently approved Saint-Cloud Ordinances. Despite the abdication of Charles X and the Dauphin Louis in favor to Charles X's grandson Henri, Duke of Bordeaux, on 2 August 1830, only seven days later Louis Philippe I, still Duke of Orléans, was elected by the Chamber of Deputies as new "King of the French".