William Durandus was born at Puy-moisson, in Provence, about the year 1220. A legend of his native country is told in the present work. [Footnote 1] He became the pupil of Henry de Luza, afterwards Cardinal of Ostia; and taught canon law at Modena. On this subject he composed a most learned work, the _Speculum Juris_; from which he obtained the title of _Speculator_: as also another treatise called _Repertorium Juris_: and a _Breviarium Glossarum in Textum Juris Canonici_. His high attainments marked him [Footnote 2] out for the office of Chaplain to Pope Clement IV. [Footnote 1: See p. 126] [Footnote 2: _Mutata fortuna_, says Doard: to what this refers, we know not.] He was afterwards Auditor of the Sacred Palace; and Legate to Pope Gregory X at the Council of Lyons. He was then made Captain of the Papal forces; in which post he assisted at the reduction of several rebellious cities, and behaved with great courage. He finally became Bishop of Mende in 1286. While in this post, and resident at Rome (for he did not personally visit his diocese till 1291, the administration of the diocese being perhaps left to a nephew of the same name, who succeeded him), he finished the work, of the first book of which a translation is presented to the reader. But it probably {ix} was commenced before; for we find from a passage in its latter half, that so far had been written during the course of this same year 1286. And there is no difficulty in the title, _Episcopus Miniatensis_, which he gives himself in the Proeme, as this could easily have been added afterwards. But it was certainly published, as Martene observes, before 1295; because Durandus speaks of the Feasts of the Holy Apostles as _semi-doubles_, whereas in that year, by a constitution of Pope Urban, they were commanded to be observed as doubles. The time at which the treatise was written more especially demands our attention; because, did we imagine it only a few years later than it really was, we might well be astonished at finding no reference to the Symbolism of the Decorated Style. The interruptions amidst which the _Rationale_ was written are feelingly alluded to by its author, in the Epilogue (p. 161). He also wrote a treatise _De Modo Concilii Generalis habendi,_ probably either suggested by, or preparatory to, that of Lyons. He afterwards went on an embassy from the Pope to the Sultan; and is by some said to have ended this life at Nicosia in Cyprus. But the fact is not so: for having governed his diocese ten years, and having refused the proffered Archbishopric of Ravenna, he departed at Rome on the Feast of All Saints, 1296, being buried in the Church of Sancta Maria super Minervam, where his monument is yet to be seen, with the following inscription:-- {x}