Cassiodorus, in his "Institution of Divine Lessons," says, "Read constantly the passions of the martyrs, which among other places you will find in the letter of S. Jerome to Chromatius and Heliodorus; they flourished over the whole earth, and provoked to imitation; you will be led thereby to the heavenly kingdom."
Next in importance to the Martyrology of Jerome and the little Roman Martyrology, comes that of the Venerable Bede. In the catalogue of his own works that he drew up, he says, "I wrote a Martyrology of the natal days of the holy martyrs, in which I took care to set down all I could find, not only on their several days, but I also gave the sort of conflict they underwent, and under what judge they conquered the world."
If we compare this Martyrology with the Acts of the Martyrs, we see at once that Bede took his account from them verbatim, merely condensing the narrative.
The Martyrology of Bede was written about 720; Drepanius Florus, a priest of Lyons, who died 860, added to it considerably, and most of the copies of Bede's Martyrology that we have are those enlarged by Florus.
The next martyrologist was Usuardus, monk of Saint-Germain-des-Prés, who died in 876. He wrote his Martyrology at the request of Charles the Bald, who was dissatisfied with the Martyrologies of Jerome and of Bede because they were too short in their narratives, and also because several days in the calendar were left blank. This account, which Usuardus gives in his preface, does not tally with the words of the epistle attributed to S. Jerome that precedes his Martyrology; and leads to the suspicion that this portion of the epistle, at least, is not genuine. Usuardus certainly used the Hieronyman Martyrology as the basis of his work, and this has caused his work to be designated the larger Hieronyman Martyrology. This work of Usuardus was so full, that it displaced the earlier Martyrologies in a great many churches. The best edition of the Martyrology of Usuardus is that of Solerius, Antwerp, 1714-1717.
Usuardus was followed by Wandelbert, monk of Prum, who died in 870. Wandelbert followed the Martyrologies of SS. Jerome and Bede, as amplified by Florus, and wrote the notices of the martyrs in hexameter Latin verses. This monument of patience is composed of about 360 metrical pieces, of which each contains the life of the Saint commemorated on the day. To these, which form the bulk of the work, are prefixed others of less importance, prefaces, dedicatory epistles to Lothair, preliminary discourses on the importance of the Martyrology, on the knowledge of times and seasons, months and days, etc. Although Wandelbert wrote for the most part in hexameters, he abandoned them occasionally for lyric metres, which he managed with less facility. D'Achéry published this Martyrology in his "Spicilegium," but the edition is a bad one.
The next martyrologist is Ado, Bishop of Vienne, who has been already mentioned in connection with the "Martyrologium Parvum." Ado was born about the year 800, and died in 875. In his preface, Ado says: "For this work of noting on their proper days the nativities of the Saints, which are generally found confusedly in calendars, I have made use of a venerable and very ancient Martyrology, at Aquileja, sent to a certain holy bishop by the Roman Pontiff, and this was lent me, when at Ravenna, for a few days by a certain religious brother. This I diligently copied, and thought to place it at the head of my work. I have, however, inserted the passions of the Saints somewhat longer in this Martyrology, for the use of the infirm brothers, and those less able to get at books, that they may be able to read out of a little book a compendium to the praise of God and the memory of the martyrs, instead of overhauling a host of big volumes with much labour." The best edition of Ado's Martyrology is that by Geo. Rhodigini, published at Rome, 1740.
There have been many later Martyrologies, but these are of far inferior importance, and need not be here enumerated. In the East, the Greeks had anciently their collections. That of Eusebius probably formed the basis of later Menologies. In the Horology are contained calendars of the Saints for every day with prayers; this portion of the Horology is called the Menology.
The Menology is divided into months, and contains the lives of the Saints, in abridgment, for each day, or the simple commemoration of those whose acts are extant. The Menology of the Greeks is, therefore, much the same as the Latin Martyrology, and there are almost as many Menologies as there are Martyrologies. The principal is that of the Emperor Basil II. (d. 1025), published by Ughelli in his "Italia Sacra." The larger Menologies are entitled "Synaxaria," because they were read in the churches on days of assembly. These lives are very long, and the Menology contains the substance in a condensed form.