A martyrology is a catalogue or list of martyrs and other saints and beati arranged in the calendar order of their anniversaries or feasts. Local martyrologies record exclusively the custom of a particular Church. Local lists were enriched by names borrowed from neighbouring churches. Consolidation occurred, by the combination of several local martyrologies, with or without borrowings from literary sources.
This is the now accepted meaning in the Latin Church. In the Orthodox Church, the nearest equivalent to the martyrology is the Synaxarion and the longer Menologion. As regards form, one should distinguish between simple martyrologies that simply enumerate names, and historical martyrologies, which also include stories or biographical details; for the latter, the term passionary is also used.
The martyrology, or ferial, of the Roman Church in the middle of the fourth century still exists. It comprises two distinct lists, the Depositio martyrum and the Depositio episcoporum, lists most frequently found united.
The Ten Martyrs (Aseret Harugei Malchut עשרת הרוגי מלכות) were ten rabbis living during the era of the Mishnah who were martyred by the Romans in the period after the destruction of the second Temple. Although all ten could not have been killed at the same time, since two of the rabbis listed lived well before the other eight, they are listed together, in a manner of a dramatic poem (known as the Eleh Ezkera) recited on two important Jewish holidays, to elicit the proper mood of the day, one of reflection and the hope of redemption in the face of attacks to the beliefs of Judaism.
The term "martyrology" is also used about the story of the deaths (martyrdom) of several famous Rabbis (including Rabbi Akiva) by Romans, read both on Yom Kippur and Tisha b'Av. Popular imagination seized upon this episode in Jewish history and embellished it with various legends relating the virtues of the martyrs and the fortitude shown by them during their execution. These legends became in the geonic period the subject of a special midrash—the Midrash 'Asarah Haruge Malkut, or Midrash Eleh Ezkerah. The deaths are described as being gruesome, including allegedly being wrapped in Torah scrolls and then being set aflame. See also Midrash Eleh Ezkerah.