This article investigates the political essay De statu et mutatione Romani imperii written between 1323 and 1324 by Landolfo Colonna. After the examination of the text’s sources, the connection between Landolfo’s treatise and the one that Marsilius of Padua wrote to mock him is considered. Furthermore, this study presents the 13 manuscripts containing the De statu, two of which are newly discovered, and also its trasmission and circulation, both in manuscript and print. Supported by his private library, by the remarkable one of Chartres Cathedral and by his knowledge in canon law, Landolfo professed his loyalty to pope John XXII describing the Empire’s translations in order to demonstrate the illegittimacy of Louis the Bavarian’s claims.
Landolfo Colonna; Empire’s translations; Marsilius of Padua; XIVth century philology.