Johann Mattheson
Christian Heinrich Postel (11 October 1658 – 22 March 1705) was a German jurist, epic poet and opera librettist, who wrote 28 libretti for the Oper am Gänsemarkt in Hamburg: set by composers such as Johann Philipp Förtsch, Reinhard Keiser and Georg Philipp Telemann. His texts for a "St John Passion" were set by composers Christian Ritter, Johann Mattheson and Johann Sebastian Bach in their respective "St John Passion".