The origins of academic dress date back to the 12th and 13th centuries, when universities were taking form. The ordinary dress of the scholar, whether student or teacher, was the dress of a cleric. With few exceptions, the medieval scholar had taken at least minor orders, made certain vows, and perhaps been tonsured. Long gowns were worn and may have been necessary for warmth in unheated buildings. Hoods seem to have served to cover the tonsured head until superseded for that purpose by the skull cap.
A statute of the University of Coimbra in 1321 required that all "Doctors, Licentiates, and Bachelors" wear gowns. In England, in the second half of the 14th century, the statutes of certain colleges forbade "excess in apparel" and prescribed the wearing of a long gown. In the days of Henry VIII of England, Oxford and Cambridge first began prescribing a definite academic dress and made it a matter of university control even to the extent of its minor details.
The assignment of colors to signify certain faculties was to be a much later development, and one which was to be standardized only in the United States in the late 19th century. White taken from the white fur trimming of the Oxford and Cambridge B.A. hoods, was assigned to arts and letters. Red, one of the traditional colors of the church, went to theology. Green, the color of medieval herbs, was adopted for medicine, and olive, because it was so close to green, was given to pharmacy. Golden yellow, standing for the wealth which scientific research has produced, as assigned to the sciences.
European institutions have always had great diversity in their specifications of academic dress and this has been a source of confusion. In contrast, American colleges and universities opted for a definite system that all might follow. A significant contribution to the development of this system was made by Gardner Cotrell Leonard of Albany, New York. Mr. Leonard designed gowns for his class at Williams College in 1887 and had them made by Cotrell and Leonard, a firm established by his family in Albany, New York. He was greatly interested in the subject and following the publication of an article by him on academic dress in 1893, he was invited to work with an Intercollegiate Commission made up of representatives of leading institutions to establish a suitable system of academic apparel. The Commission met at Columbia University in 1895 and adopted a code of academic dress, which besides regulating the cut and style and materials of the gowns, prescribed the colors which were to represent the different fields of learning.
In 1932 the American Council on Education authorized the appointment of a committee "to determine whether revision and completion of the academic code adopted by the conference of the colleges and universities in 1895 is desirable at this time, and, if so, to draft a revised code and present a plan for submitting the code to the consideration of the institutional members of the Council." The committee reviewed the situation through correspondence and approved a code for academic costumes that has been in effect since that year.