Piano sonatas (Beethoven)
Ludwig van Beethoven wrote his 32 piano sonatas between 1795 and 1822. Although originally not intended to be a meaningful whole, as a set they compose one of the most important collections of works in the history of music. Hans von Bülow called them "The New Testament" of the piano literature (Johann Sebastian Bach's "The Well-Tempered Clavier" being "The Old Testament").
Piano Sonata No. 7 (Beethoven)
Ludwig van Beethoven's Piano Sonata No. 7 in D major, Op. 10, No. 3, was dedicated to the Countess Anne Margarete von Browne, and written in 1798. This makes it contemporary with his three Op. 9 string trios, his three Op. 12 violin sonatas, and the violin and orchestra romance that became his Op. 50 when later published. The year also saw the premiere of a revised version of his second piano concerto, whose original form had been written and heard in 1795.