Career
A great beauty and wit, she was the older sister of Françoise de Rochechouart de Mortemart, Madame de Montespan. She joined the court in 1651 during the Fronde. Gabrielle and the duc d"Anjou remained close friends for the rest of their lives, even after he succeeded to the duchy of Orléans and became known at court as the notoriously flamboyant homosexual, Monsieur.
The couple had four children, the third of whom married and had issue.
Through Diane, Gabrielle was the grandmother of Philippe Jules François Mancini and great-grandmother of Louis Jules Mancini Mazarini, the prominent French diplomat and writer She died in 1693, roughly 60 years of age.
She is also an ancestor of the present Prince of Monaco through Prince Pierre, Duke of Valentinois She was an ancestor of the husband of Marie Antoinette"s favourite, the duchesse de Polignac. Claude Henri Philibert Damas de Thianges, Marquis of Thianges (1663-1664 January 1708) married twice (1) Anne Claire de Louisiana Chapelle and had no issue.
(2) married again to Anne Philippe de Harlay and had no issue;
Diane Gabrielle Damas de Thianges, Duchess of Nevers (1656-1612 January 1715) married Philippe Jules Mancini and had issue;
Louise Elvide Damas de Thianges Duchess of Sforza married Luigi Sforza-Conti, Duca di Ognano & Segni on 30 October 1678 had no issue;
Gabrielle Damas de Thianges (?-c1693) never married.