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Ludwig van Beethoven's Piano Sonata no. 7 in D major, one of three piano sonatas in his tenth opus, was dedicated to the Countess Anne Margarete von Browne, and written in 1798. This makes it contemporary with his String Trios, Op. 9, the Violin Sonatas Op. 12, and the Violin Romance that became 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.) The Op. 10 sonatas are usually described as angular or experimental, as Beethoven began moving further and further away from his earlier models. The Third sonata is the longest, spanning approximately 24 minutes and being the only one in 4 movements.