Catholic Church. Martyrology

The 'Catholic Church. Martyrology' refers to the Roman Martyrology, the official liturgical book of the Catholic Church listing saints, martyrs, and feasts by their dies natalis. Officially published by Pope Gregory XIII in 1584 following liturgical reforms after the Council of Trent, it draws from earlier sources like St. Bede, Usuard, and Church Fathers. It remains obligatory for the Roman Rite and has been updated over centuries, including recent additions by Pope Francis.