Robert IV de La Marck

Robert IV de La Marck (1491, Sedan, Ardennes, 15 January 1512 – Guise, 1556), was Duke of Bouillon,Seigneur of Sedan and a Marshal of France.

He was the only son of Robert III de La Marck and Guillemette de Sarrebruck.

Aged 17, he became captain of the Swiss Guards. In 1547 King Henry II made him a Marshal of France, and sent him to Rome as French Ambassador. In 1552, he participated in the Siege of Metz and took back possession of his Duchy of Bouillon, which had been occupied by the troops of Charles V, Holy Roman Emperor, for 30 years.

As Lieutenant General in Normandy, he is made prisoner in Hesdin in July 1553. He is kept in prison and badly treated in Flanders until the Treaty of Vaucelles of February 1556.

Released for a very high ransom, he died soon after, presumably poisoned before his release, on the orders of Charles V.
He is buried at the Eglise Saint-Laurent in Sedan.

He married in 1538 with Françoise de Brézé, daughter of Louis de Brézé and Diane de Poitiers and had 9 children :

...
Wikipedia