Question: When did Élisabeth Sophie De Lorraine's husband die?
Answer: 8 August 1788

) was a French noblewoman and the second wife of Armand de Vignerot du Plessis, the notoriously lecherous Duke of Richelieu. Louis François "Armand" de Vignerot du Plessis, 3rd Duke of Richelieu (13 March 1696 – 8 August 1788), was a French soldier, diplomat and statesman. He joined the army and participated in three major wars