Another class of documents consists of the ordos drawn up for divine service belonging to particular countries, dioceses, or the more important ecclesiastical foundations (ordines, ordinaria; in Greek, typica). These were not originally drawn up for the course of merely one year, like our present ordos, but contained the list of recurring festivals and fasts observed from year to year in some monastery or cathedral, along with detailed directions for the performance of divine service. The most important of these are the thirteen oldest ordos of the Roman Church, collected and published by Mabillon, but other dioceses and monasteries as well as the Church of Rome had similar ordos, some of which have been already printed,[745] while others still await publication.[746] 2. _The Earliest Christian Calendars_ The worship of the saints, especially of the martyrs, asserted itself in various ways in the liturgy of the Church. Among the Latins, it appeared even in the liturgy of the mass, since special masses in honour of the saints were composed at an early date for the commemorations of the most celebrated saints. These were included in the sacramentaries, and, finally, as their number continued to increase, they were placed together in a separate division of the book (_proprium sanctorum_), instead of being distributed, as formerly, over the whole year. Among the Greeks, this was not possible, since they repeat the same mass daily, and employ only two or three mass formularies throughout the entire year. In the second place, the cultus of the saints gained a footing in the Canonical Hours, the Psalter, both among Latins and Greeks. It was customary among the Latins as early as the sixth century to read a portion of the account of the martyrdom (passiones martyrum), as Aurelian of Arles tells us;[747] this was the commencement of the existing lections of the breviary. Then collections of lives of the saints for the whole year were drawn up on the lines of the calendar, which came to be called martyrologies on account of the character of the larger part of their contents. In course of time, two kinds of martyrologies came into existence, those containing legends of greater length more suited for private reading, and those distinguished by the brevity of their notices intended for employment in the services of the Church. Even these have no immediate connection with the liturgy, although the names of the saints for the day were read at Prime, a custom which possibly the Council of Aix-la-Chapelle of 817 had in view in its sixty-ninth canon.[748] These martyrologies developed out of the diptychs and calendars of particular churches, by way of compilation and expansion; like the calendars, they contain simply the names of the saints, but with the mention of the locality to which the saint belonged, and, in many cases, with an indication of the date at which he lived.