The "Lexicon Latinitatis Nederlandicae Medii Aevi" (Dutch dictionary of mediaeval Latin) forms part of the project of the Union Academique Internationale to replace the old Glossarium of Du Cange by a set of modern national dictionaries of mediaeval Latin. Its sources are formed by those texts, written by Dutch authors or on Dutch territory from between c.800 and 1500, which have been printed, and include accounts as well as chronicles, lives of saints, and philosophical and theological treatises.