Arras, Bibliothèque municipale 585, fol. 6r

Robert Gibbs, "The Bratislava Gratian and its Position in the Tree of Trees of Consanguinity and Affinity,"  ARS 42 (2009) 168-180

Bratislava, Slovak National Archives 14 (Jur. 46), fol. 3r

Gratian, D.1 --- My Thanks to Father Richard Bona for bring this Illumination to my attention.