However they also drew on the Insular tradition, especially for decorative detail, whilst greatly improving on that in terms of the depiction of the human figure. Copies of the scriptures or liturgical books illustrated on vellum and adorned with precious metals were produced in abbeys and nunneries across Western Europe. A work like the Stockholm Codex Aureus ("Gold Book") might be written in gold leaf on purple vellum, in imitation of Roman and Byzantine Imperial manuscripts.[5] Anglo-Saxon art was often freer, making more use of lively line drawings, and there were other distinct traditions, such as the group of extraordinary Mozarabic manuscripts from Spain, including the Saint-Sever Beatus, and those in Girona and the Morgan Library.