A, To Beethoven' is a phrase used to describe the dedication of a piece of music to Ludwig van Beethoven, a German composer and pianist who lived from 1770 to 1827. He was one of the most influential composers of all time and is widely considered to be one of the greatest musicians in history. His works are still performed today and he is remembered for his innovative compositions and his influence on the development of classical music. The phrase 'A, To Beethoven' is often used to honor his legacy and to recognize the impact he had on the world of music.