HILLER, JOHANN ADAM (I , German musical composer, was born near Gorlitz, in Silesia, on Dec. 25, 1728. He studied law at Leipzig, but adopted music as a profession. In 1789 he became cantor of the Thomasschule, and died at Leipzig, where practically the whole of his life was spent, on June 16, 1804. Hiller played an important part in the German musical life of his day. To him was due the foundation of the famous Gewandhaus concerts in Leipzig. He had much to do with the re-establishment in favour of the Singspiel and the general popularization and development of light opera, while he helped materially also in the cultivation and development of the German Lied as against the Italian operatic aria. He did good propagandist work for Handel also, and the Messiah was first given in Berlin (more than 4o years after it was composed) under his baton. He was a prolific author as well as a copious composer, his literary works including his autobiography to be found in the volume Lebens beschreibungen beriihmter Musikgelehrten and Tonkiinstler (1784) and also, more accessibly, in Einstein's Lebenlaufe deutscher Musiker von ihnen selbst erzahlt (ii).