This monograph is the first in-depth examination of articulated Roman plate armour since H. Russell Robinson published his ground-breaking reconstructions of lorica segmentata in The Armour of Imperial Rome. With detailed discussion of all the significant evidence (including previously unpublished material), the book looks at each of the principal types, using photographs and scale drawings of original finds, alongside full-sized physical and specially-prepared computer-generated reconstructions. It examines the origins of this form of armour, its strengths and weaknesses, a wide range of technical details, together with practical aspects relating to its reproduction.