When the Seventh Coalition armies entered Paris, he drew up the declaration asserting the necessity of maintaining the principles of government that had been established at the Revolution.

[1] From 1817 until 1849 (through the Bourbon Restoration and the July Monarchy) he was, without interruption, a member of the chamber of deputies, and he acted consistently with the Liberal opposition, of which he was the virtual leader.

[citation needed] For a few months in 1830 he held office as Minister of Justice, but, finding himself out of harmony with his colleagues, resigned before the end of the year and resumed his place in the opposition.

He can therefore be considered as France's first[citation needed] Presidential Head of State, though Louis-Napoléon Bonaparte, later in the same year, was the first to formally bear the title of President of the French Republic.

[1] His consistency in defending the cause of constitutional liberalism throughout the many changes of his times gained him the respect of many of his countrymen, who referred to Dupont de l'Eure as "Aristides of the French tribune".