Iron Age and Roman Hut Groups
The most extensive evidence of settlement and land use is provided by the Hut Groups and Field Systems. Although these sites, where excavated, usually produced material of Roman date, it is possible that they reflect a pre-Roman pattern.
The most distinctive pattern of site is the Rectilinear Hut Group, where an enclosure made up of straight walls may contain up to a dozen huts of both circular and rectangular plans. These sites may be a native imitation of the Roman Villa. Finds usually indicate that they were occupied after 200 A. D.
The Oval Enclosures show less uniformity of pattern and date. The scattered huts occur mainly in upland areas, perhaps because similar sites
have elsewhere been destroyed by later activity, and they may be associated with pastoral farming.
Many sites have adjacent tracts of ground which show traces of agricultural use. The areas of such field systems range from about 5 acres to about 15 acres per site. Traces of metalworking - principally ironwork - have been found on many sites (e.g., Hafod Wern-las, Cae Meta).