It is the only liturgical book that was written before the Moorish invasion and is the only surviving Visigothic manuscript containing figural decoration.
A marginal gloss indicated that the manuscript was produced in Tarragona, at the church of Saint Fructuosus.
The orational contains antiphons and responsories that are not neumed; no music exists in the codex.
This manuscript is also important because it contains the first written sample of an early Italian language different from Late Latin, written in northern-Italian cursive minuscule and known as the "Veronese Riddle": "Se pareba boves, alba pratalia araba, albo versorio teneba, negro semen seminaba", which can be translated more or less as "In front of him (he) led oxen, White fields (he) plowed, A white plow (he) held , A black seed (he) sowed".
This can be easily interpreted as a representation of the act of holding a pen and writing on a white sheet.