Klagt, Kinder, klagt es aller Welt, BWV 244a

Klagt, Kinder, klagt es aller Welt, also known as Köthener Trauermusik, BWV 1143, BWV 244a, is a cantata by Johann Sebastian Bach. He composed it in 1729 for the funeral of Leopold, Prince of Anhalt-Köthen. The music is lost, but the libretto survives. As Bach is known to have used musical material which also appeared in two surviving works, one being the St Matthew Passion, it has been possible to make reconstructions.