Johann Georg Albrechtsberger (1736-1809) was an Austrian composer, organist, and music theorist.
He became one of the most learned and skillful contrapuntalists of his age.
His fame as a theorist attracted a large number of pupils, some of whom afterwards became eminent musicians, including Ludwig van Beethoven. Beethoven had arrived in Vienna in 1792 to study with Joseph Haydn, but quickly became infuriated when his work was not being given attention. Haydn recommended his friend Albrechtsberger, with whom Beethoven then studied harmony and counterpoint.
With the growing popularity of the piano during this period, it is of special importance to have preserved this rare organ concerto which clearly has strong classical elements.