In 1576 he joined the Protestant party of Henry of Navarre (the future Henry IV), negotiating the Peace of Nérac between Protestants and Catholics in 1579. Appointed lieutenant general of Upper Languedoc in 1580, he took part in the siege of Paris in 1590 after the accession of Henry IV to the throne, and conquered Stenay from the Catholic League in 1591.
In April 1612 the Duke came to London as the ambassador of Marie de' Medici. He was received at court in state, and brought 100 or 250 followers. His lodgings at the Charterhouse were hung with tapestries, including rooms for his teenage nephew Henri de La Trémoille. He was brought to his first reception at the Banqueting House at Whitehall Palace by the Duke of Lennox in a convoy of 30 coaches. The court was wearing black mourning for the death of Anne Catherine wife of Christian IV of Denmark.[7]
According to the Venetian ambassador, Antonio Foscarini, his instructions included an offer of a marriage between Princess Christine, the second Princess of France, and Prince Henry. Anne of Denmark told one of his senior companions that she would prefer Prince Henry married a French princess without a dowry than a Florentine princess with any amount of gold.[8]
He died in Sedan in 1623.
Issue
Henri married on 19 November 1591, Charlotte de La Marck, suo jure Duchess of Bouillon. They had a son who was born and died on 8 May 1594.
^ abcdeLe prix de la pairie: les évaluations du duché d'Albret (1655-1657), Christophe Blanquie, Revue d'histoire moderne et contemporaine, T. 50e, No. 2 (Apr. - Jun., 2003), 6. https://www.jstor.org/stable/20530953.
^Encarta Encyclopaedia Winkler Prins (1993–2002) s.v. "La Tour d'Auvergne. § Henri de la Tour d'Auvergne I". Microsoft Corporation/Het Spectrum.