Mildred Morford Andrews Boggess (1915-1987) was an outstanding twentieth century organ teacher and performer. She was the highest-honored Professor of Music at the University of Oklahoma between June 1938 to June 1976. She produced at least twelve Fulbright Fellowship scholars and many winners at national or regional performance competitions. Boggess was inducted into the Oklahoma Hall of Fame in 1971. Upon her retirement in 1976, headlines read: “The End of an Era,” “Winningest Coach of the Console,” and “The Legend Ends.” Her dedication to the University and the arts was such that head football coach Barry Switzer, Oklahoma Governor David Boren, Congressman Tom Steed, House Speaker Carl Albert, President Gerald Ford, and Vice President Nelson Rockefeller all extended their congratulations to her. This thesis is the first academic publication based upon her biographical materials. It includes an analysis of her pedagogical methods and impact upon sacred music in the twentieth century, in relation to prevailing ideology at the time and the Organ Reform Movement.