This paper examines an unpublished consilium written by the Perugian jurist Dionysius de Barigianis in 1434-1435 which refers to the Peace concluded in March 1421 between the Varanos, lords of Camerino, and the commune of Norcia. Building on the analysis of four papal letters, the paper affords new insights into the conclusion and the contents of the Peace, thereby setting the context for the subsequent discussion of Barigianis' consilium. The edition of these letters and the consilium is provided in the Appendix.