The purpose of this history is to describe the founding and maturation of the Phi Mu Alpha Sinfonia Fraternity of America during the twentieth century and to define the role of Sinfonia in the emergence of American music during that period. The second half of the nineteenth century saw a quickening pace in the development and spread of American musical institutions. Major American cities had established symphonies, New York's Metropolitan Opera was established, and Conservatories of Music sprang up. Although Sinfonia was originally founded as a social organization, it quickly became a means for furthering the cause of American music. This extensive history begins with the minutes of the first meeting at the New England Conservatory of Music on October 6, 1898 and covers the ups and downs of the "professional fraternity for men in music" up to its centennial in 1998. Includes an extensive Sinfonia Chronology, names on the National Executive Committees from 1901-1998, and Province Governors and Collegiate Province Representatives.