The Martyrology of Donegal: A Calendar of the Saints of Ireland is a comprehensive reference book compiled by John O'Donovan. This book is a detailed account of the lives and deaths of the saints of Ireland, as well as their feast days and other important events. It includes information on over 1,000 saints, along with their biographies, legends, and miracles. The book is organized by month and day, making it easy to find specific saints or events...