They also participated in illuminating the manuscript De Civitate Dei, written by Augustine of Hippo.
An open book on Hildebert's writing desk shows a Latin inscription which reads: "Pessime mus, saepius me provocas ad iram.
It is possible that the complaint was intended as a criticism of the poor working conditions of some medieval artists.
The most renowned scene from the manuscript depicts Pope Gregory the Great, who is surrounded by two groups of noblemen, clerics and Benedictine monks.
Hildebert, Everwin and the monk R. (apparently the scribe of the manuscript) are depicted at the bottom of the scene.