Ludwig van Beethoven baptised 17 December 1770[1] – 26 March 1827) was a German composer and pianist. He is considered to have been the most crucial figure in the transitional period between the Classical and Romantic eras in Western classical music, and remains one of the most famous and influential composers of all time. Born in Bonn, then the capital of the Electorate of Cologne and a part of the Holy Roman Empire of the German Nation in present-day Germany, he moved to Vienna in his early twenties and settled there, studying with Joseph Haydn and quickly gaining a reputation as a virtuoso pianist. His hearing began to deteriorate in the late 1790s, yet he continued to compose, conduct, and perform, even after becoming completely deaf.