Johann Abraham Peter Schulz Johann Abraham Peter Schulz (31 March 1747, Lüneburg – 10 June 1800,Schwedt) was a German musician. He is best known as the composer of the melody for Matthias Claudius's poem "Der Mond ist aufgegangen" and the Christmas carol "Ihr Kinderlein kommet". (1747-1800) - Piano Sonata, Op.2 (1778) Autor: Johann Abraham Peter Schulz (1747-1800) Obra: Pia..