Beethoven's musical style
The compositions that Beethoven wrote in his formative period can be generally characterized by the composer's efforts to master the predominant classical language of the period. His works from this period can be subdivided into two, based on the composer's residence. First, various juvenalia, written when the adolescent Beethoven was in residence in Bonn and heavily indebted to the works of contemporaries, especially Mozart and his teacher, Christian Gottlob Neefe. These early efforts can be seen in a set of three piano sonatas and piano quartets (WoO 36) that Beethoven wrote before 1792. The Quartets, for instance, are each specifically modelled after three Violin sonatas Mozart published in 1781 – K 296, 379 and 380 – and Beethoven would later draw upon this familiarity in the composition of several of his own Violin Sonatas.
Sonatas for viola da gamba and harpsichord (Bach)
Although the dating of Bach's three sonatas for viola da gamba and cembalo has presented problems for musicologists, because only an autograph score of the first sonata BWV 1027 survives, there is now general consensus that the works were written in Leipzig at some time in the late 1730s and early 1740s. Prior to that commentators had suggested that they dated from an earlier period when Bach was in Cöthen or even beforehand: the viola da gamba player Christian Ferdinand Abel was one of the court musicians of Prince Leopold at Cöthen. Bach moved to Leipzig as Thomaskantor in 1723 and in 1729 was appointed director of the Collegium Musicum, a chamber music society that put on weekly concerts at the Café Zimmermann.