From 1594 to 1641 the duchy remained vested in the French family of La Tour d'Auvergne, one of whom (Henry, viscount of Turenne and marshal of France) had married in 1591 Charlotte de la Marck, the last of her race.
This amazing reversal of policy was procured by the intrigues of Catholic diplomatists and German French Jesuits, conveyed to Paris by Prince de la Tour d'Auvergne.
However, his ability was too great to be neglected by a great minister such as Charles Gravier, Comte de Vergennes undoubtedly was, and after a preliminary tour to Berlin at the beginning of 1786 he was despatched in July 1786 on a secret mission to the court of Prussia, from which he returned in January 1787, and of which he gave a full account in his Histoire secrete de la tour de Berlin (1789).
In 1676 the duke of Crequy seized it in the name of Louis XIV., who in 1678 gave it to Godefroy Marie de La Tour d'Auvergne, whose descendants continued in possession till 1795.
De' Medici and a French princess, Madeleine de la Tour d'Auvergne.
De Gramont, Histoire d'Alger sous la domination turque (1887); Mercier, Histoire de l'Afrique septentrionale (1888-1891); Eugene Plantet, Correspondance des deys d'Alger avec la tour de France (1889-1892); Paul Masson, Histoire des etablissements et du commerce francais dans l'Afrique barbaresque (1903); General Faure-Biguet, Histoire de l'Afrique septentrionale sous la domination musulmane (1905); (b) for the French period: Camille Rousset, La Conquete d'Alger (8th ed., 1899), Les Commencements d'une conquete: l'Algerie de 1830 a 1840, with atlas (1887), and La Conquete de l'Algerie, 184118J7, with atlas (1889); Pelissier, Annales algeriennes (1854); Leon Roches, Trente-deux ans a travers l'Islam (1884-1887); Colonel Trumelet, Histoire de l'insurrection des Ouled-Sidi-Cheik (1887); Rinn, Histoire de l'insurrection de 1871 (1891).
Is to be found in Les Memoires de la tour d'Espagne of the Marquis de Villars (London, 1861), and the Letters of the Marquise de Villars (Paris, 1868).
The princess wrote Aventures de la tour de Perse, in which, under the veil of fictitious scenes and names, she tells the history of her own time.
CHARLES CAGNIARD DE LA TOUR (1777-1859), French engineer and physicist, was born in Paris on the 31st of March 1 777, and after attending the Ecole Polytechnique became one of the ingenieurs geographiques.
His marriage in March 1518 was arranged by the pope with Madeleine la Tour d'Auvergne, a royal princess of France, whose daughter was the Catherine de' Medici celebrated in French history.