Under the electoral law of 1817 the Abbé Grégoire, who was popularly supposed to have voted for the death of Louis XVI of France in the convention, was admitted to the Chamber of Deputies. The Conservative party gained strength from the alarm raised by this incident and still more from the shock caused by the assassination of the duc de Berry. The duc de Richelieu was compelled to admit to the cabinet two of the chiefs of the "ultras", Villèle and Corbière. Villèle resigned within a year, but on the fall of Richelieu at the end of 1821 he became the real chief of the new cabinet, in which he was minister of finance.