Ludwig van Beethoven (baptised 17 December 1770 – 26 March 1827) was a German composer and pianist. He is regarded as a central figure in the history of Western art music, and his works are among the most frequently performed in the classical repertoire. His career spans the transition from the Classical period to the Romantic era. Beethoven’s early period, generally dated to about 1802, reflects his development within established Classical forms. His middle period, from around 1802 to 1812, shows a more individual musical voice influenced by, but increasingly distinct from, the styles of Joseph Haydn and Wolfgang Amadeus Mozart, and is often described as heroic. His late period, from approximately 1812 until his death in 1827, is characterised by expanded formal structures and heightened expressive depth. During the middle period he experienced progressive hearing loss, which later became profound. Beethoven was born in Bonn, where he demonstrated musical ability at an early age. His initial instruction came from his father, Johann van Beethoven, followed by more systematic training with Christian Gottlob Neefe. Under Neefe’s guidance, Beethoven published his first work in 1783, a set of keyboard variations. He found support and stability in the household of Helene von Breuning, whose children he befriended and taught piano. At the age of 21, he moved to Vienna, which became his permanent base, and studied composition with Haydn. He soon established a reputation as a virtuoso pianist and attracted the patronage of Karl Alois, Prince Lichnowsky, leading to the publication of his three Opus 1 piano trios in 1795. Beethoven’s First Symphony premiered in 1800, and his first set of string quartets appeared in print in 1801. By around 1798, he had begun to experience hearing difficulties, which gradually worsened. Despite this, he continued to perform and conduct, overseeing the premieres of his Third and Fifth Symphonies in 1804 and 1808. His Violin Concerto was first performed in 1806. His final piano concerto, Piano Concerto No. 5, Op. 73, commonly known as the "Emperor", was dedicated to Archduke Rudolf of Austria and premiered in 1811, with Beethoven no longer appearing as soloist. By 1815, he was nearly completely deaf, had ceased performing, and rarely appeared in public. His personal struggles are reflected in two notable documents: the "Heiligenstadt Testament" of 1802, written to his brothers, and the unsent 1812 letter known as the "Immortal Beloved". From around 1810 onward, as his isolation increased, Beethoven composed many works that are considered among his most significant achievements, including his late piano sonatas, mature chamber music, and his final three symphonies. His only opera, "Fidelio", was first performed in 1805 and revised several times before reaching its final form in 1814. He composed the "Missa solemnis" between 1819 and 1823, and his Symphony No. 9, which incorporates vocal soloists and chorus and is often cited as the first major choral symphony, between 1822 and 1824. His late string quartets, including the "Grosse Fuge" composed in 1825–1826, represent some of his final works. After several months of illness that left him bedridden, Beethoven died in Vienna on 26 March 1827 at the age of 56.