Located on the second floor of the building, in the spaces that were inhabited by Pope Innocent X, the room overlooks Via dell'Anima. It owes its name to Olimpia Maidalchini, popularly known as "La Pimpaccia" (Pimpa was the name of the astute character of a comedy in vogue in Baroque Rome), which filled the Roman chronicles of the seventeenth century with its extravagant personality. Ambitious since childhood, he moved from his modest origins to the Roman patriciate, marrying Pamphilius Pamphilj, brother of the future Pope Innocent X. He dedicated his life to the aforementioned Pope who, together with the Holy Court, worked for ten years at his leisure, both to be passed into history as "La papessa".
He lived together with the Pope, he ate with him, who wanted favors from him had to resort to Donna Olimpia. Regardless of the gossips, who called her a lover of the pope, throughout her life she exploited her privileged position by amassing riches with cunning, threats and subterfuges. Despite its bad reputation as a poor woman, it should be recognized the important role it played in the Pamphilj factories, so much so that the tradition wants it to manage the construction of the Innocenziano College, where we are today.