Ludwig van Beethoven‘s Piano Sonata No. 23 in F minor, Op. 57 (colloquially known as the Appassionata, meaning “passionate” in Italian) is a piano sonata. Among the three famous piano sonatas of his middle period (the others being the Waldstein, Op. 53 and Les Adieux, Op. 81a), it was composed during 1804 and 1805, and perhaps 1806, and was dedicated to Count Franz von Brunswick. The first edition was published in February 1807 in Vienna.
The Appassionata was considered by Beethoven to be his most tempestuous piano sonata until the twenty-ninth piano sonata (known as the Hammerklavier), being described as a “brilliantly executed display of emotion and music”. 1803 was the year Beethoven came to grips with the irreversibility of his progressively deteriorating deafness.