Bach's chorale cantata
... that Bach's chorale cantata Ach Gott, vom Himmel sieh darein, BWV 2, based on Luther's hymn, is part of "the largest musical project that the composer ever undertook"?
... that <b id="mwBNU"><a href="./Chorale_cantata_(Bach)" id="mwBNY" rel="mw:WikiLink" title="Chorale cantata (Bach)">Bach's chorale cantata</a></b> <a href="./Ach_Gott,_vom_Himmel_sieh_darein,_BWV_2" id="mwBNc" rel="mw:WikiLink" title="Ach Gott, vom Himmel sieh darein, BWV 2"><i id="mwBNg">Ach Gott, vom Himmel sieh darein</i>, BWV<span id="mwBNk" typeof="mw:Entity"> </span>2</a>, based on <a href="./Ach_Gott,_vom_Himmel_sieh_darein" id="mwBNo" rel="mw:WikiLink" title="Ach Gott, vom Himmel sieh darein">Luther's hymn</a>, is part of "the largest musical project that the composer ever undertook"?