Frontiers of the Roman Empire : Ffiniau'r Ymerodraeth Rufeinig /

: The remains of the Roman frontiers in Wales are unique in the Roman Empire. More than 60 stone and timber fortresses, forts and fortlets, some of which seem to have been occupied for only a few years, while others remained in use for far longer, tell the story of the long and brutal war against the Celtic tribes.
: Also issued in print: 2022.
"This work is licensed under the Creative Commons Attribution-NonCommerical-NoDerivatives 4.0 International License"--Title page verso. : 1 online resource (96 pages) : illustrations (black and white, and colour), maps (black and white, and colour) : Specialized. : Includes bibliographical references. : 9781803272924 (PDF ebook) : : Open access.