It was probably first performed on Good Friday ( 11 April ) 1727 in the Thomaskirche in Leipzig , where Bach was Kapellmeister . He made some changes to it by 1736 and performed it again on 30 March 1736 . The St Matthew Passion was probably first performed on 11 April 1727 in the St. Thomas Church , and again on 15 April 1729 , 30 March 1736 , and 23 March 1742 .