stylistic:tone, linguistic:voice_change
Works

Hildegard's works include three great volumes of visionary theology; a variety of musical compositions for use in the liturgy, as well as the musical morality play Ordo Virtutum; one of the largest bodies of letters (nearly 400) to survive from the Middle Ages, addressed to correspondents ranging from popes to emperors to abbots and abbesses, and including records of many of the sermons she preached in the 1160s and 1170s; two volumes of material on natural medicine and cures; an invented language called the Lingua Ignota ('unknown language'); and various minor works, including a gospel commentary and two works of hagiography.

Several manuscripts of her works were produced during her lifetime, including the illustrated Rupertsberg manuscript of her first major work, Scivias; the Dendermonde Codex, which contains one version of her musical works; and the Ghent manuscript, which was the first fair-copy made for editing of her final theological work, the Liber Divinorum Operum. At the end of her life, and probably under her initial guidance, all of her works were edited and gathered into the single Riesenkodex manuscript. The Riesenkodex manuscript is a collection of 481 folios of vellum bounded by wooden boards bound in pig leather that measure 45 by 30 centimetres (18 by 12 in).