[1][2] His father, Louis Bénigne François Bertier de Sauvigny, was murdered during the French Revolution of 1789.

[2] By 1823, he served under Louis Antoine, Duke of Angoulême in the Hundred Thousand Sons of Saint Louis.

[3] One of his goals was to bring the House of Bourbon back in power, and he succeeded when Louis XVIII of France became King of France in 1815.

[3] Moreover, he wanted the Pope, not the head of state, to be the ultimate religious authority in France.

[3] De Bertier de Sauvigny married Thaïs Le Fèvre d'Ormesson, the daughter of Henri Lefèvre d'Ormesson.