Around the year 786 the abbot of the monastery of San Martín de Liebana, Santander, known as Beatus wrote a commentary on Book of Revelation.
In the first third of the 20th century, it was studied by technicians as prestigious as HA Sanders, W Nieves and Mn.Pere Pujol, archivist of the Cathedral, all of which have tried to emphasize paleographic interest and artistic importance of the codex and clarify any issues of bibliographic fact.
Unlike some other surviving Beatus MS, it carries no indication of its place of origin and date, so it is impossible to identify the calligraphers and miniaturist.
On 29 September 1996, two members of an organized gang of art thieves stole the Beatus after cutting the power and breaking the window of the museum.
This group was caught in Valencia on 21 January 1997, among other works of art the police recovered the intact Beatus.