The Decretals, then, which we so often meet with in public libraries under various names, are the canons which mainly constitute the Canon Law. Strictly speaking they are the papal epistolary decrees (decreta), said to have existed from very early times. In the ninth century a collection of them was formed, or manufactured, in the name of the celebrated Isidore of Seville. But with the donation of Constantine to Pope Sylvester and many others in the later compilation of Gratian, these are usually looked upon as spurious and false. The great and authorised collection was completed by a simple Benedictine monk of St. Felix, in Bologna, a native of Chiusi, the ancient Clusium, in Tuscany, a man so learned in the law as to have earned the title of "Magister." This is the work often richly illuminated which goes by the name of the "Decretum Gratiani."[43] When glancing over the lovely initials and beautiful foliages or resplendent ornaments, we are apt to overlook the work itself which is truly monumental; being a summary of the papal epistolary decrees, the synodal canons of 150 councils, selections from various regal codes, extracts from the Fathers, and comments of Schoolmen; all methodically arranged and digested so as to facilitate its use as a manual for the schools. It is said to have occupied the compiler incessantly for twenty-five years. Immediately on its completion in 1151 it was at once authorised by the Pope Eugenius III. as the only text-book to be used in the public schools, and to govern the decrees of the Ecclesiastical Courts. Hence its celebrity. Its transcripts are very numerous, and it has been often printed. As to the Sext and Clementines they are merely additional commentaries on supplementary collections of decrees. Thus a new collection authorised by Boniface VIII. is called the _sext_, _i.e._ the sixth book of the Decretals. The Clementines were the constitutions of Clement V. Other collections such as that of John XXII. are called Extravagantes.
The most ancient MSS. of the Decretals bear the title of _Concordantia discordantium Canonum_ (a "concordance of discordant decrees"); afterwards The Book of Decrees; lastly, The Decretals. It was considered, however, by some, jurists and others, to be not so much a concordance of discordant canons as a subjugation of the ancient canons to the decrees of the Papacy, and as already stated, many of its decrees were found to be false and fictitious. Nevertheless, it is by no means an uncommon volume among the illuminators. Let us now return to the Laon example--one of four or five of the species in that collection. The scene where the author is presenting his work to the pope--we now know them both--is quite a painting. Except for the defect that kneeling figures are somewhat mis-shapen or ill-proportioned in the lower limbs, the work is quite comparable with contemporary mural painting, both for composition and colour. It is almost modern. It is quite realistic. In costume, expression, easy and appropriate attitude, it has quite outrun French illumination altogether.