After his death in 1650, her mother, Geronima Mazzarini, brought her daughters from Rome to Paris in the hope of using the influence of her brother, Cardinal Mazarin, to gain them advantageous marriages.

Soon after her sister Marie's marriage to Prince Lorenzo Onofrio Colonna, Olympia was appointed Superintendent of the Queen's Household which gave her authority over and above that of all of the other ladies at Court with the exception of the Princesses of The Blood.

About the latter, the Queen Mother Anne of Austria was deeply concerned about Louis XIV spending much time entertaining himself away from his wife, in the company of other women including the Duchess of Orléans, her maids of honor and Olympia.

Mademoiselle de Fouilloux, in her letter, stipulated that Olympia was well aware that Louise had worked for a long time for this goal.

[5] Ultimately, Louis XIV fell in love with Louise de La Vallière and Olympia turned against her.

She was asked to leave the royal court in January 1680 and immediately left France for Brussels, thereby avoiding arrest and being put to trial for involvement in the Affaire des Poisons.

She died in Brussels on October 9, 1708, just three months after her son Eugene's victory at The Battle of Oudenarde on July 11, 1708, which was her 70th birthday.