Li Livres de Jostice Et de Plet

Li livres de jostice et de plet(z) ("The Books of Justice and of Pleas") is an Old French legal treatise compiled by the postglossators of the school of Orléans in the mid-thirteenth century (c. 1260). It was influenced by canon law (especially the decretals of Gregory IX), Roman law (especially the Digest), the customary law of the Orléanais, and the legislation of the Capetian Kings of France. It does not have the sense of a finished work, possesses lacunae, and is somewhat disorganised, being possibly the work of a student of the University of Orléans.

The first book of the Livres is a free translation of the first three paragraphs of the Digest. It is not a coutoumier (compilation of customary law) and most of the customary law it cites is limited to Orléans. Among the royal acts it reproduces is one of Saint Louis from 1254, in which the king depicted as judge declares himself the guardian of the peace and rest of his subjects: nos deserrens de la dete de la real poesté la pez et le respous de nos sojeiz. The Livres may have influenced the later legislation of Philip the Fair.