Cadbury Castle is a fortified hill in south Somerset whose history began long before the legends attached to it. Neolithic and Bronze Age activity preceded the creation of major defenses during the Iron Age. From about the fifth century BCE, communities enlarged the enclosure with successive banks, ditches, timber structures, and complex entrances. Its summit covered roughly seven hectares and commanded routes across the surrounding lowlands. The labor invested in its ramparts demonstrates organized regional power, while finds reveal farming, craft production, exchange, storage, feasting, and domestic occupation.

During the later Iron Age the hillfort became one of the leading centers associated with the Durotriges. Houses, metalworking, pottery, imported goods, and coinage connected its inhabitants with networks extending across southern Britain and the Channel. Archaeology indicates violent destruction around the middle of the first century CE, plausibly during the Roman conquest, though no surviving written account names a battle there. Roman military material and later activity show that the hill did not simply vanish from use, but its role as an independent fortified center ended.

The most striking later phase belongs to the fifth or sixth century. Defenses were renewed on a formidable scale, and a large timber hall stood near the summit. Imported Mediterranean pottery indicates elite contacts reaching beyond western Britain. These discoveries support interpretation as a powerful post-Roman center, but they do not identify a known ruler. John Leland recorded local belief in the sixteenth century that the hill was Camelot, and later writers linked its archaeology to King Arthur. No inscription or contemporary evidence proves that association.

The hill was fortified again during the early eleventh century, probably amid conflicts of the late Anglo-Saxon period. Thereafter it returned chiefly to agriculture and pasture. Antiquarian digging began before modern archaeological methods, while Leslie Alcock’s major excavations from 1966 to 1970 established the sequence of Iron Age, Roman-conquest, and post-Roman occupation. Media attention emphasized Arthur, sometimes overshadowing the richer evidence for many different communities. Later analysis has refined dates and reconsidered how the site’s power changed across centuries.

Cadbury Castle remains privately owned but is accessible by public paths and protected as a scheduled monument. Its principal visible features are grass-covered ramparts and ditches; timber buildings and most occupation evidence survive below ground. Erosion, livestock, vegetation, and heavy foot traffic can damage deposits that appear robust. The site rewards a layered reading: prehistoric gathering and settlement, Iron Age political center, conquest-era violence, post-Roman stronghold, Saxon reuse, and modern legendary landscape. Camelot is part of its reception history, not an archaeological conclusion.