ever wrote), which steadily increased in their musical sophistication. The last three—K. 216, K. 218, K. 219—are now staples of the repertoire. In 1776, he turned his efforts to piano concertos, culminating in the E concerto K. 271 of early 1777, considered by critics to be a breakthrough work. Despite these artistic successes, Mozart grew increasingly discontented with Salzburg and redoubled his efforts to find a position elsewhere. One reason was his low salary, 150 florins a year; Mozart longed to compose operas, and Salzburg provided only rare occasions for these. The situation worsened in 1775 when the court theatre was closed, especially since the other theatre in Salzburg was primarily reserved for visiting troupes. Two long expeditions in search of work interrupted this long Salzburg stay. Mozart and his father visited Vienna from 14 July to 26 September 1773, and Munich from 6December 1774 to March 1775. Neither visit was successful, though the Munich journey resulted in a popular success with the premiere of Mozart's opera La finta giardiniera. 1777–78: Journey to Paris In August 1777, Mozart resigned his position at Salzburg and on 23 September ventured out once more in search of employment, with visits to Augsburg, Mannheim, Paris, and Munich. Mozart became acquainted with members of the famous orchestra in Mannheim, the best in Europe at the time. He also fell in love with Aloysia Weber, one of four daughters of a musical family. There were prospects of employment in Mannheim, but they came to nothing, and Mozart left for Paris on 14 March 1778 to continue his search. One of his letters from Paris hints at a possible post as an organist at Versailles, but Mozart was not interested in such an appointment. He fell into debt and took to pawning valuables. The nadir of the visit occurred when Mozart's mother was taken ill and died on 3July 1778. There had been delays in calling a doctor—probably, according to Halliwell, because of a lack of funds. Mozart stayed with Melchior Grimm at Marquise d'Épinay's residence, 5 rue de la Chaussée-d'Antin. While Mozart was in Paris, his father was pursuing opportunities of employment for him in Salzburg. With the support of the local nobility, Mozart was offered a post as court organist and concertmaster. The annual salary was 450 florins, but he was reluctant to accept. By that time, relations between Grimm and Mozart had cooled, and