and during her childhood her birthday was instead celebrated the day before, on All Saints' Day, due to the connotations of the date. Shortly after her birth she was placed under the care of the governess of the imperial children, Countess von Brandeis. Maria Antonia was raised together with her sister, Maria Carolina, who was three years older, and with whom she had a lifelong close relationship. Maria Antonia had a difficult but ultimately loving relationship with her mother, who referred to her as "the little Madame Antoine". Maria Antonia spent her formative years between the Hofburg Palace and Schönbrunn, the imperial summer residence in Vienna, where on 13 October 1762, when she was seven, she met Wolfgang Amadeus Mozart, two months her junior and a child prodigy. Despite the private tutoring she received, the results of her schooling were less than satisfactory. At the age of 10 she could not write correctly in German or in any language commonly used at court, such as French or Italian, and conversations with her were stilted. Under the teaching of Christoph Willibald Gluck, Maria Antonia developed into a good musician. She learned to play the harp, the harpsichord and the flute. She sang during the family's evening gatherings, as she was known to have had a beautiful voice. She also excelled at dancing, had "exquisite" poise, and loved dolls. Later in 1768, Mathieu-Jacques de Vermond was dispatched by Louis XV to tutor Maria Antonia as she became the future wife to Louis XVI. Serving as an educator, Abbe de Vermond found her to be unsatisfactorily educated and lacking in, at the age of 13, important writing skills. Nonetheless, he also complimented her stating "her character, her heart, are excellent". He found her "more intelligent than has been generally supposed," but since "she is rather lazy and extremely frivolous, she is hard to teach". Dauphine of France (1770–1774) Following the Seven Years' War and the Diplomatic Revolution of 1756, Empress Maria Theresa decided to end hostilities with her longtime enemy, King Louis XV of France. Their common desire to destroy the ambitions of Prussia and Great Britain, and to secure a definitive peace between their respective countries led them to seal their alliance with a marriage: on 7 February 1770, Louis XV formally requested the hand of Maria Antonia for his eldest surviving grandson and heir, Louis-Auguste, Duc de Berry and Dauphin of