His friend and pupil, the Archduke Rudolph, was appointed Archbishop of Olmütz in 1818, and Beethoven began in the autumn a grand Mass for the Installation. The ceremony was in March, 1820; the Mass was not finished until 1822; it was published in 1827, and there were seven subscribers at about $115 a copy; among them were the Emperor of Russia, the King of Prussia, and the King of France. The summer and autumn of 1818 and '19 were spent at Mödling in the composition of the Mass, relieved only by anxious thoughts about his nephew. Sketches for the 9th symphony date back to 1817, and the theme of the scherzo is found in 1815. This colossal work was in his mind together with a tenth, which should be choral in the adagio and the finale, even when he wrote the overture in C for the opening of the Josephstadt Theatre in Vienna and watched with fiery eyes Wilhelmine Schröder-Devrient, the Leonora of the revival in 1822. In this same year Rossini, sweeping all before him, visited Vienna, and tried to call on Beethoven. According to Azevedo the interview was painful between the young man flushed with success and the deaf and "almost blind" composer of the Heroic Symphony. But Schindler affirms that Beethoven succeeded in escaping the visits. The operatic triumphs of Rossini and the thought of the Schröder-Devrient again led him to meditate opera. There were discussions concerning music to Goethe's "Faust," not in set operatic form, but incidental airs, choruses, symphonic pieces and melodrama. In June, 1823, he was hard at work on the Ninth Symphony. He passed whole days in the open air at Hetzendorf, but his host, a baron, was too obsequiously civil, and he moved to Baden, where in the fall he received a visit from Weber. The Philharmonic Society of London in 1822 passed a resolution offering Beethoven £50 for a MS. symphony; the money was advanced, and the work was to be delivered in the March following. Ries was in London in the fall of 1823, and in September he heard from Beethoven that the manuscript was finished, nevertheless there was additional work on it after the return to Vienna; and according to Wilder, who quotes Schindler, the finale was not written until Beethoven was in his new lodgings in town, and the use of the voices in Schiller's Ode was then first definitely determined, although the intention was of earlier date.