Marie Angélique de Mackau reportedly had great importance for the development of Élisabeth of France, and was evidently in possession of "the firmness which bends resistance, and the affectionate kindness which inspires attachment", and under whose tuition she made progress in her education, as well as developed a softer personality, with her strong will directed toward religious principles.
Marie Angélique de Mackau continued to serve as governess during the reign of Louis XVI.
Mackau accompanied the royal family to the Tuileries Palace in Paris after the Women's March on Versailles during the French Revolution in October 1789.
[1] When Marie Thérèse of France was released from the Temple in 1795 and allowed to depart for Austria, she requested that Mackau accompany her.
Because of her advanced age, such a long journey was not considered good for her health, and Mackau was forced to decline; her daughter Renée Suzanne de Soucy took her place.