The Departamento de Bellas Artes (DBA; Department of Fine Arts) was founded as one of the departments of the Secretaría de Educación Pública (SEP). It had a Music Section, which centered its activities on teaching music, at all levels in the entire country, with socialist ideology and under the firm belief that the fine arts should be part of the education of the people. To do so, it defined a repertoire of songs and their arrangements that was coherent and had a nationalistic discourse. The selection of songs was taken from diverse sources, some of which were the result of bibliographic research, mostly done in the DBA, but the important groups of melodies and songs that were sung in schools and adult choruses came from the National Music Archive, which was created to be the foundation and massive sample compilation of Mexican music. The composers and researchers at the time had little or no idea what the characteristics of indigenous music was; and to create nationalistic music and national dances, they needed references of what was Mexican, what was traditional. The archive was a massive and ambitious project, and the DBA was a national institute with the authority to write to all the governors in the country asking for references of folk music, local fiestas, and traditional dances, of which composers and researchers knew very little. Composers and musicians participated in sending in samples of scores or lyrics, then institutional programs were designed for rural teachers to compile music in distant regions and towns. Much of the material that was sent in was well known songs, popular ranchera music, and the indigenous music that was expected to create teaching and nationalist programs required so further research. Much of the music used in the educational programs derived from contributions made by rural teachers, and the indigenous music was compiled by few specialists who travelled only with their ears, pencils, and paper and returned with a rough selection of melodies that outlined the indigenous music of Mexico. Other sources of reference, music scores and dance descriptions, came from official events and dance contests held by the DBA in Michoacan, Hidalgo, Estado de México, and Mexico City.