The full, ancient text, De Excidio et Conquestu Britanniae.De Excidio et Conquestu Britanniae (or On the Ruin and Conquest of Britain), is an ancient text by a

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

Gildas's 'De Excidio Britanniae' is the prime source of our knowledge of post-Roman Britain, but because it is such an isolated text, for which we have no obvio