This Commentary produced at during the last years of the 11th century at the Benedictine monastery of Santo Domingo de Silos (Burgos, Spain) contains a colorful version of Apocalypse by Beatus of Liébana. Also commented with beautiful initials, graphs and fantasy-filled illustrations are the few folios of Mozarabic antiphonary, Isidore of Seville's Etymologiae as well Jerome's commentary on Daniel. Noteworthy are the 'cithara' depictions, both finger-plucked and bowed, as well as the differencia