Watch FMovies. Ruth Ziesak, soprano ; Anna Larsson, contralto ; Christoph Genz, tenor ; Dietrich Henschel, bass ; GewandhausKammerchor ; Gewandhausorchester Leipzig ; Herbert Blomstedt, conductor. Recorded in performance May 8, 2005, St. Thomas Church, Leipzig, during the 2005 Bachfest Leipzig. Special features include: Bach and his B minor Mass, an introduction by Herbert Blomstedt (21 min.)