He obtained his early education at Marburg and Jena, and returning to France continued his studies at Orléans and Bourges.
He entered the service of Pardaillan, and in 1587 was sent on a mission to many of the princes of northern Europe, after which he visited England to obtain help from Queen Elizabeth for Henry of Navarre.
He continued to serve Henry as a diplomatist, and in 1593 became the representative of the French king at the courts of the imperial princes.
Vigorously seconding the efforts of Henry to curtail the power of the house of Habsburg, he spent health and money ungrudgingly in this service, and continued his labors until the king's murder in 1610.
He collected the works of several French writers who as contemporaries described the crusades, and published them under the title Gesta Dei per Francos (Hanover, 1611).