This chorale prelude by J.S. Bach is a somber reflection on mortality, built upon the hymn tune 'All people must die'. Its musical distinction lies in its intricate contrapuntal texture and expressive harmonic language.
Developing a clear contrapuntal line while maintaining legato phrasing is the primary challenge.
Alle Menschen müssen sterben (BWV 262) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Alle Menschen müssen sterben (BWV 262) lasts about 3 minutes.
Alle Menschen müssen sterben (BWV 262) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.