After graduating from high school in 1885, Sibelius began to study law at the Imperial Alexander University in Finland but, showing far more interest in music, soon moved to the Helsinki Music Institute (now the Sibelius Academy) where he studied from 1885 to 1889. One of his teachers was its founder, Martin Wegelius, who did much to support the development of education in Finland. It was he who gave the self-taught Sibelius his first formal lessons in composition. Another important influence was his teacher Ferruccio Busoni, a pianist-composer with whom he enjoyed a lifelong friendship. His close circle of friends included the pianist and writer Adolf Paul and the conductor-to-be Armas Järnefelt, (who introduced him to his influential family including his sister Aino who would become Sibelius's wife). The most remarkable of his works during this period was the Violin Sonata in F, rather reminiscent of Grieg.