Although Rheinberger was successful during his lifetime in a variety of genres, he is remembered today largely for his demanding organ works, which comprise twenty sonatas and twenty-two trios. The sonatas are composed in a big, bold and virtuosic style and are considered among the major works composed for the instrument in the nineteenth century. The Five Trios, Op. 189 are more intimate pieces, complementing the rhetoric of the sonatas with a more reflective style of composition.