The Augsburg Centennial Singers, a 50-voice male chorus, will appear in concert at Our Savior’s on Friday, Sept. 21, at 7:00 p.m. Paul Christensen, the Singers’ director, has chosen a variety of music by classical composers including J. S. Bach, contemporary composers including Leland B. Sateren, familiar hymn tunes, folk songs, and a patriotic set including “God Bless America.” A freewill offering will be received.