High Quality Content by WIKIPEDIA articles! Hillforts in Britain refers to the various hillforts within the island of Great Britain. Although the earliest such constructs fitting this description come from the Neolithic period, with a few also dating to the later Bronze Age, British hill forts were primarily constructed during the Iron Age. Some of these were apparently abandoned in the southern areas that were a part of Roman Britain, although at the same time, those areas of northern Britain that remained free from Roman occupation saw an increase in their construction. Some hillforts were reused in the Early Mediaeval period, and in some rarer cases, into the Later Mediaeval period as well. By the Early Modern period these had essentially all been abandoned, with many being excavated by archaeologists in the nineteenth century onward.