In 1572–1573, Jean de Monluc was the French envoy in Poland to negotiate the election of Henry of Valois, future
Henry III of France, on the Polish throne, in exchange for military support against Russia, diplomatic assistance in dealing with the
Ottoman Empire, and financial help. He was not eager and tried to refuse, preferring to direct negotiations from Paris, but Queen Catherine was insistent. Monluc departed Paris on 17 August, the day before the marriage of
Henry of Navarre and
Marguerite d'Angoulême. He was at
Saint-Dizier, where he had fallen ill with dysentery, when he heard the news of the
Saint Bartholomew's Day Massacre. He wrote immediately to the Court, demanding a full account of what had happened, knowing that he would have to answer many questions from hostile persons during his trip and during the negotiations in Poland. He was arrested at
Saint-Mihiel in Lorraine and taken to prison in
Verdun, under the suspicion that he was involved in the massacre. He wrote to
Catherine de Médicis on 1 September, and shortly the King sent orders for his release. He was again detained in
Frankfurt by some disgruntled German Huguenot troops, complaining that they had never been paid. He finally arrived in Poland at the end of October, where he found widespread plague. The French court, having heard of the horror caused by the massacre, and believing that Monluc needed help, sent
Gilles de Noailles, brother of
François de Noailles, former bishop of Dax, whose star had fallen along with that of Cardinal
Odet de Chatillon and who had been declared heretic by Pope Pius IV at the recommendation of the head of the Roman Inquisition Michele Ghislieri (the future Pope Pius V). Monluc, fearing the loss of his own prestige, tried to refuse the help, but de Noailles was sent anyway. Negotiations were slow. There were several candidates, and the Polish nobility expected to be wooed and bribed from every direction. There were Protestant and Catholic interests at work. A quick election would cut short their game. They all affected to be shocked and scandalized by the St. Bartholomew's Day Massacre. Monluc gave two notable speeches (
harangues), one before a plenary session of the Polish nobility on 10 April 1573, and the other before the Estates of Poland on 25 April, which contributed materially to the success of his diplomacy. Henry of Valois was elected King of Poland on 16 May 1573. The Bishop of Valence later wrote his own narrative of his heroic efforts,
Election du Roy Henry III, roy de Pologne, décrite par Jean de Monluc, Évêque de Valence (Paris 1574). The story was also told in the memoires of Monluc's secretary, Jean Choisnin (Paris 1789). In 1576–1577, Jean de Monluc took part in the
Estates of Blois. He spoke in December on the proposal to revoke the edict of pacification and resume the war against the Huguenots. ==Death==