She received her first check when, Damiens having attempted to assassinate the king, the dauphin was regent for eleven days. She was confined to her room and heard nothing from the king, who was in the hands of the clergy. Among the friends who abandoned her was her protégé Machault, the guard of the seals, who conspired with D'Argenson to deprive her of her power and went so far as to order her departure. After the king's recovery, both D'Argenson and Machault were dismissed and Mme. de Pompadour became more powerful than before.
Her influence and usurpation of power bore heavily upon every department of state; she appointed all the ministers, made all nominations, managed the foreign policy and politics, directed the army and even arranged the plans of battle. Absolute mistress of the ministry, she satisfied all demands of the Austrian court, a move which brought her the most flattering letter from Kaunitz, in which he gives her the credit for all the transactions between the two courts.
Despite all her political duties and intrigues, she found time for art and literature. Not one minute of the day was lost in idleness, every moment being occupied with interviews with artists and men of letters, with the furnishers of her numerous châteaux, architects, designers, engineers, to whom she confided her plans for embellishing Paris. Being herself an accomplished artist, she was able to win the respect and attention of these men. Her correspondence was immense and of every nature, political and personal. She was an incessant reader, or rather student, of books on the most serious questions, which furnished her knowledge of terms of state, precedents of history, ancient and modern law; she was familiar with the contents of works on philosophy, the drama, singing, and music, and with novels of all nations; her library was large and well selected.
During the latter years of her life she was considered as the first minister of state or even as regent of the kingdom, rather than as mere mistress. Louis XV. looked to her for the enforcement of the laws and his own orders. She was forced to receive, at any time, foreign ambassadors and ministers; she had to meet in the Cabinet de Travail and give counsel to the generals who were her protégés; the clergy went to her and laid before her their plaints, and through her the financiers arranged their transactions with the state.