This book is one of Gildas' most important works. It is a sermon condemning the secular and religious behavior of his contemporaries. The author Saint Gildas is

This book employs new archaeological and historical evidence to explain how and why Roman Britain became Anglo-Saxon England.

Gildas wrote this about 540 AD or just before when he was forty three years old. It is a fierce denunciation of the rulers and churchmen of his day, prefaced by

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced