Carl Philipp Emanuel Bach—also known as C. P. E. Bach—was a German Classical period composer and musician. He was born on March 8, 1714, in Weimar, Saxe-Weimar, Holy Roman Empire, and died on December 14, 1788, in Hamburg, Holy Roman Empire. Bach was active during the transition from the Baroque style to the Classical style. He developed the "sensitive style," applying rhetoric and drama to his music. Bach's notable works include sonatas, concert pieces, and the oratorio Die Auferstehung und Himmelfahrt Jesu. He was known for his contributions to keyboard technique and his influential treatise Essay on the true art of playing keyboard instruments. Bach's work influenced composers such as Haydn, Mozart, Beethoven, and Mendelssohn.