Ringsbury Camp

Ringsbury is a multivallate fort, as it has a double-banked structure. In all about 3.4 hectares (8.4 acres) are enclosed by the surrounding walls.^[1] The inner bank is up to 5m high and is surrounded by a 3m deep ditch; the outer bank is 2m high and there are traces of an outer ditch.^[1]

The fort stands on the brow of an outcrop of Corallian stone,^[1] overlooking Braydon Forest to the west and with excellent views to the south and north; there is less of an incline towards the east. It is believed that to ensure visibility was not impeded the builders cleared all areas, and certainly the land towards the west, from trees. The banks are made from limestone rubble.^[2] These are not local rocks, suggesting material was transported to the camp from further afield.

The stones from the banks are very light, and are known as 'blood stones'. A reason for the lightness of the rocks was said to be blood soaking into the stones when they were used as missiles during battles; however, nowadays chemical weathering – carbonation – of the limestone is thought to account for their light mass.

Historians have suggested that the fort may not have been used continually, but as an enclosure in times of unrest. Unrest was common in these times: the fort lies on the boundary of two old British kingdoms, and there were two major Celtic invasions in the years around which the fort was constructed. The fort is not part of the larger chain of hill forts along the Ridgeway, such as Barbury Castle, suggesting Ringsbury was an outpost. There are signs of earlier habitation of the site: Neolithic flint tools have been found within the fort.^[3]

One Iron Age coin was discovered at the site, and is currently displayed in Purton Museum.

Andrew Breeze has argued that Ringsbury Camp is the site of the Battle of Mount Badon in the late 5th century or early 6th century. He bases his case on geographical and toponymic evidence, with nearby Braydon being the Badon named by Gildas and the Welsh Annals.^[4]