||Herr, unser Herrscher
|Composer Time PeriodComp. Period
||12 voices (SATB+SSAB+SAAB) (unknown, see below, Comments)
Grove Music does not list anything by Sommer for 12 voices, though there are 2 Christmas songs and 2 motets with no instrumentation listed. Tagged for undetermined instrumentation until an original can be found.