 John XXII added to it the last official collection of Canon law, the "Liber Septimus Decretalium", better known under the title of "Constitutiones Clementis V", or simply "Clementinæ" (Quoniam nulla, 25 October 1317).Later on the canonists added to the manuscripts of the "Decretals" the most important constitutions of succeeding popes.These were soon known and quoted as "Extravagantes", i. e. twenty constitutions of John XXII himself, and those of other popes to 1484.