Clavier. From about 1785 Reicha studied composition secretly, against his uncle's wishes, composing and conducting his first symphony in 1787 and entering the University of Bonn in 1789, where he studied and performed until 1794, when Bonn was attacked and captured by the French. He managed to escape to Hamburg, vowed never to perform in public again and began to earn a living teaching harmony, composition and piano. He continued composing and studied mathematics, philosophy and, significantly, methods of teaching composition. In 1799 he moved to Paris, hoping to achieve success as an opera composer. These hopes were dashed, however: he could neither get his old librettos accepted nor find suitable new ones despite support from friends and influential members of the aristocracy, and moved on to Vienna in 1801. Once there, like Beethoven and the young Schubert, he studied with Antonio Salieri and Johann Georg Albrechtsberger. Both were renowned teachers, and Albrechtsberger was also an important theorist and acknowledged authority on counterpoint and fugal theory. Reicha called on Haydn, whom he had met several times in Bonn and Hamburg during the 1790s, and renewed his friendship with Beethoven, whom he had not seen since 1792, when the latter moved from Bonn to Vienna. At this time (late 1802–1803) Beethoven's Eroica symphony was in gestation, and it is likely that the two men exchanged ideas on fugues in modern composition. Reicha's move to Vienna marked the beginning of a more productive and successful period in his life. As he wrote in his memoirs, "The number of works I finished in Vienna is astonishing. Once started, my verve and imagination were indefatigable. Ideas came to me so rapidly it was often difficult to set them down without losing some of them. I always had a great penchant for doing the unusual in composition. When writing in an original vein, my creative faculties and spirit seemed keener than when following the precepts of my predecessors." In 1801, Reicha's opera L'ouragan, which failed in Paris, was performed at the palace of Prince Joseph Franz von Lobkowitz, a prominent patron of Beethoven. Empress Maria Theresa (of Naples and Sicily) commissioned another opera after this performance, Argine, regina di Granata, which was only privately performed. His studies in Hamburg came to fruition here with the publication of several semi-didactic, encyclopedic works such as 36 Fugues for piano (published in 1803, dedicated to Haydn) and L'art