The Codex Argenteus (Latin for "Silver Book/Codex"), is a 6th-century manuscript, originally containing bishop Ulfilas's 4th century translation of the Bible into the Gothic language. Of the original 336 folios, 188—including the Speyer fragment discovered in 1970—have been preserved, containing the translation of the greater part of the four gospels. A part of it is on permanent display at the Carolina Rediviva library in Uppsala, Sweden.
The tribes we consider Gothic were nominally Arians during the period of time when Ulfilas translated the Christian bible into Gothic, meaning that they followed the teachings of Arius about the person and nature of Jesus Christ. The "Silver Bible" was probably written for the Ostrogothic King Theodoric the Great, either at his royal seat in Ravenna, or in the Po valley or at Brescia. It was made as a special and impressive book written with gold and silver ink on high-quality thin vellum stained a regal purple, with an ornate treasure binding. After Theodoric's death in 526 the Silver Bible is not mentioned in inventories or book lists for a thousand years.
Parts of the "Codex Argenteus" (literally, "Silver Book"), 187 of the original 336 parchment folia, were preserved at the former Benedictine abbey of Werden (near Essen, Rhineland), one of the richest monasteries of the Holy Roman Empire. The abbots at Werden were imperial princes and had a seat in the Imperial Diet. While the precise date of the "Silver Bible" is unknown, it was rediscovered at Werden in the 16th century.