, . In 1615, he was appointed commander of the
Louvre Palace and counsellor, and the following year
Grand Falconer of France. He used his influence over the king in the court intrigues against the queen-mother
Marie de' Medici and her favourite
Concini. It was Luynes who, with
Vitry, captain of the guard, arranged the plot that ended in Concini's assassination in 1617, and secured all the latter's possessions in
Italy and France. Also in 1617, he was appointed captain of the
Bastille and lieutenant-general of
Normandy. He employed extreme measures against the
pamphleteers of the time, but sought peace in Italy and with the
Protestants. In August 1619, he negotiated the
Treaty of Angoulême by which Marie de' Medici was accorded complete liberty. The same month he was made governor of
Picardy and
Duke of Luynes. He had recently purchased the Comté de
Maillé on the
Loire, about 10 miles west of
Tours, and the king erected Maillé into the Duchy of
Luynes, which included about 50
parishes and extended to the western wall of Tours and around it on three sides. On 14 November 1619, he was officially received as a duke and a
Peer of France at a ceremony in the great hall of the
Parlement of Paris. His rapid rise to power made him a host of enemies, who looked upon him as but a second Concini. He suppressed an uprising of nobles in 1620.
1621 expedition In 1621, at the king's request, Luynes agreed to lead an expedition against the Protestants in the southwest, even though Luynes had for a long time been opposed to the campaign. As part of the agreement, Louis appointed him
Constable of France, even though Luynes had slight military ability or achievement. He was sworn in on 2 April. Luynes received the post in part by default: the obvious choice, the
Duke of Lesdiguières, was a Protestant and refused to abjure. Later, after Luynes's death, Lesdiguières converted and became constable. Luynes was involved in the failure of the
Siege of Montauban (17 August – 2 November), for which he received much criticism, although he had not been the field commander. The Duke died of
scarlet fever in December 1621 at Château de
Longueville in the midst of the campaign. ==Personal life==