He came to France in the train of Marie de' Medici, and married the queen's lady-in-waiting, Leonora Don, known as Galigai. The credit which his wife enjoyed with the queen, combined with his wit, cleverness, and boldness, made his fortune. In 1610 he had purchased the marquisate of Ancre and the position of first gentleman-in-waiting. Then he obtained successively the governments of Amiens and of Normandy, and in 1614 the baton of marshal.
From then first minister of the realm, he abandoned the policy of Henry IV, compromised his wise legislation, allowed the treasury to be pillaged, and drew upon himself the hatred of all classes. The nobles were bitterly hostile to him, particularly Condé, with whom he negotiated the treaty of Loudun in 1616, and whom he had arrested in September 1616. This was done on the advice of Richelieu, whose introduction into politics was favoured by Concini.
By this time, Louis XIII, incited by his favourite Charles d'Albert, duc de Luynes, was tired of Concini's tutelage. The baron de Vitry received in the king's name the order to imprison him. Apprehended on the bridge of the Louvre, Concini was killed by the guards on the 24th of April 1617. Leonora was accused of sorcery and sent to the stake in the same year.
In 1767 appeared at Brescia a De Conemi vita, by D Sandellius. On the role of Concini see the Histoire de France, published under the direction of Ernest Lavisse, vol. vi. (1905), by Mariejol.
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