Editing Mass in B minor (section)

===III. Sanctus===
#''Sanctus''

::Six-part chorus (Soprano I & II, Alto I & II, Tenor, Bass) in D major, no autograph tempo marking, {{music|common-time}} time signature; leading immediately—without double bar in the sources—into the ''Pleni sunt coeli'', marked Vivace, {{music|time|3|8}} time signature. Derived from an earlier three soprano and one alto work written in 1724 and repeated and altered slightly on Easter 1727; in that 1724/1727 ''Sanctus'' the first section was marked in {{music|cut-time}}, perhaps suggesting a tempo faster than what Bach conceived of when he finally re-used it in the Mass.
[[File:Benedictus-BWV232.jpg|thumb|Autograph score of the ''[[Sanctus|Benedictus]]'', aria for tenor and obbligato flute]]