In 1567, just four years after the start of construction of the Escorial Monastery, founded and instituted as King Philip II a workshop for children who live in the monastery. During the building of the monastery this seminar was installed in the abbey bought the King Párraces (Segovia) for this purpose.

This group of children of the seminar had as its main function sing daily Mass Alba, which is always officiated by the health of the reigning monarch in the Spanish throne and the Salve after the vespers. Besides singing the Mass, for choir that they were composed, they were also involved in the major liturgical feasts, as well as the welcoming kings and other famous people in the monastery, where dancing and entertainment comedies represented the Royal Family .

Since its inception the King cared for these children to receive a good education and well studied grammar and latinidad, music and chant and, of course, not be neglected that children acquire good and Christian customs.

While these children of the seminar there was another group of children between 4 and 8 as times, they should have good singing voice pitched voices in the Chapel of Music of the Monastery in designated holidays. The institution of the Seminar held until the confiscation of Mendizabal.

Later, thanks to Antonio Maria Claret, chaplain of Queen Elizabeth II, the school children, creating within it a number of scholarships for boys who were to join the choir was restored; ie the Choir. In 1974, already with the Augustinian Monastery at the head of religious, we proceeded to the reestablishment of the choir of singing children's hand P. Vicente Gomez Mier, at that time Provincial of the Augustinians of the Escorial, and Fr. Pedro Blanco, who served as Director of the Choir for a long period of time.

At present there are about 45 children singers that make up the Choir. They reside in the monastery of El Escorial and are attended by the community of Augustinian religious and other specialist teachers in music.

Each year, they selected a group of twelve children from those presented to fill one of the vacancies, and following an examination of their qualities and skills are scholarship to continue his studies at the Escorial monastery, where they receive a careful human formation , academic and music while having the good fortune to live in this unique building.