The Codex Aureus of St. Emmeram is a 9th-century illuminated Gospel Book. It takes its name from Saint Emmeram's Abbey, where it was for most of its history and is lavishly illuminated. The cover of the codex is decorated with gems and relief figures in gold, and can be precisely dated to 870, and is an important example of Carolingian art, as well as one of very few surviving treasure bindings of this date.

A Gospel Book, Evangelion, or Book of the Gospels, is a codex or bound volume containing one or more of the four Gospels of the Christian New Testament – normally all four – centering on the life of Jesus of Nazareth and the roots of the Christian faith. The term is also used for a liturgical book, also called the Evangeliary, from which are read the portions of the Gospels used in the Mass and other services, arranged according to the order of the liturgical calendar.