 Duprat's influence extended much beyond the departments of justice and finance placed under his direct control.French historian Gabriel Hanotaux, in the introduction to his "Recueil des instructions", calls Duprat 
This influence was constantly exerted to strengthen royal absolute power; it was felt in the measures he took against the grands Seigneurs and in his elaborate fiscal system.Duprat left no writings, but took a leading part in the compilation of the "Coutumes d'Auvergne"; he also did much to encourage the renaissance of letters.