"On the Fall of Britain" is a work by the famous British historian Gildas, which is one of the most important sources on the history of early medieval Britain. In his work, the author addresses contemporaries with questions about the reasons for the fall of the Roman Empire and the arrival of Celtic tribes on the island. It reveals a picture of the complex political events, social crises and wars that led to the destruction of Britain in the 5th century. Gildas's book not only provides a unique opportunity to better understand the historical context of the period, but also prompts the reader to reflect on the mysteries and lessons of the past. Its pages are filled with the drama of great changes, losses and victories that shaped the face of ancient Britain and influenced the further development of Europe. "On the Fall of Britain" is a book that reveals the secrets of the past to the reader, inspiring the search for connections between the past and the present.