The chorale harmonisations BWV 250–438 were probably all extracted from lost larger vocal works. For six of them the work they have been derived from has been identified. Bach's chorale harmonisations are all for a four-part choir (SATB), but Riemenschneider's and Terry's collections contain one 5-part SSATB choral harmonisation ("Welt, ade! ich bin dein müde", Riemenscheider No. 150, Terry No. 365), not actually by Bach, but used by Bach as the concluding chorale to cantata "Wer weiß, wie nahe mir mein Ende", BWV 27.