The missal is held in the library of the Monastery of Santo Domingo de Silos near Burgos, Spain as Codex 6, though it originated from the monastery of Santa María la Real of Nájera.
The missal is held in the library of the Monastery of Santo Domingo de Silos near Burgos, Spain as Codex 6. The Silos Library has been an important repository of liturgical manuscripts of the Mozarabic rite, but the missal originated from the monastery of Santa María la Real of Nájera.