Enclosures of this type are among the most common yet least understood categories of site in the Irish landscape. The term covers a broad range of structures, from the circular ringforts that once served as farmsteads in the early medieval period to later boundary works whose purpose is less easily read. What they share is a deliberate shaping of the ground, a drawing of a line between inside and outside, and the question of who did that, and why, tends to linger long after the earthwork itself has softened into the fields.