Hermann von Reichenau Biography (Wikipedia)
Hermann of Reichenau (July 18, 1013 – September 24, 1054), also called Hermannus Contractus or Hermannus Augiensis or Herman the Cripple, was an 11th-century scholar, composer, music theorist, mathematician, and astronomer. He composed the Marian prayer Alma Redemptoris Mater. He was beatified (cultus confirmed) in 1863.
Hermann von Reichenau Tracks