in this year that his first song with guitar accompaniment, "Liebeszauber", was printed. Some of his most original and innovative songs were written during the following years, including "Er an Sie" (1808) and "Was zieht zu deinem Zauberkreise" (1809). Later career 1810–1826 In 1810, Weber visited several cities throughout Germany; 1811 was a pivotal year in his career when he met and worked with the Munich court clarinetist Heinrich Baermann and composed the Concertino in E Major, Op. 26, J. 109, and the two concerti J. 114 and J. 118 for him; from December 1811 through March 1812, Weber went on tour with Baermann playing the clarinet works, and it was some of the final concerts on this tour that changed public, critical and royal opinions of Weber's work, and helped him to mount a successful performance of Silvana in Berlin later that year. From 1813 to 1816 he was director of the Opera in Prague; from 1816 to 1817 he worked in Berlin, and from 1817 onwards he was director of the prestigious Opera in Dresden, working hard to establish a German opera, in reaction to the Italian opera which had dominated the European music scene since the 18th century. He was inspired in this endeavour by the ideals of the Sturm und Drang period, and also by the German folk song collection "Des Knaben Wunderhorn" by Arnim and Brentano. It was in 1816 that he wrote the Duet Op.38 for guitar and piano, possibly inspired by similar works printed in Vienna by such composers as Hummel and Diabelli. On 4 November 1817, he married Caroline Brandt, a singer who created the title role of Silvana. In 1819, he wrote perhaps his most famous piano piece, Invitation to the Dance. The successful premiere of Der Freischütz on 18 June 1821 in Berlin led to performances all over Europe. On the very morning of the premiere, Weber finished his Konzertstück in F minor for Piano and Orchestra, and he premiered it a week later. In 1823, Weber composed his first (and only) full-length, through-composed opera Euryanthe to a libretto by Helmina von Chézy, several passages of which (notably the music for the villainous couple Lysiart and Eglantine) anticipate the early, romantic operas of Richard Wagner. In 1824, Weber received an invitation from The Royal Opera, London, to compose and produce Oberon, based on Christoph Martin Wieland's poem of the same