The St. Olaf Choir, with 75 mixed voices, is a premier a cappella college choir in the United States. Since its founding in 1912, the choir has set a standard of choral excellence that has been influential to many other church and college choirs. Conducted since 1990 by Anton Armstrong, just the fourth conductor in the choir's history, the St. Olaf Choir continues to develop the tradition that originated with its founder, F. Melius Christiansen.