Ludwig van Beethoven (December 16, 1770 – March 26, 1827) was a German composer and virtuoso pianist. He was an important 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, Germany, he moved to Vienna, Austria, in his early twenties and settled there, studying with Joseph Haydn and quickly gaining a reputation as a virtuoso pianist. Beethoven's hearing gradually deteriorated beginning in his twenties, yet he continued to compose masterpieces, and to conduct and perform, even after he was completely deaf.