After the death of Henry IV, de Thou had a disappointment; the queen regent, Marie de Medici, refused him the position of "premier président" of the parlement, appointing him instead as a member of the "Conseil des finances" intended to take the place of Sully. This was to him a demotion; he continued, however, to serve under her, and took part in the negotiations of the treaties concluded at Ste Menehould (1614) and Loudun (1616). He died in Paris. His son was François Auguste de Thou, who was executed by King Louis XIV and Cardinal Richelieu, as an accomplice with Henri Coiffier de Ruzé, Marquis of Cinq-Mars in 1642.