|'Knowlton Rings' consists of 4 earthworks: the North Circle, Church Circle, Southern Circle, and the 'Old Churchyard'. In addition to these sites, to the east of the Church Circle is the Great Barrow, the largest round barrow in Dorset, and almost certainly directly related to the henges. The most prominent site in the complex is the 'Church Circle', now commonly called Knowlton Henge.|
The Heritage plaque at the site says that the henge was constructed c. 2,500 B.C, consisting of a ring bank with two entrances and an internal ditch, 'probably intended for ceremonial use'. It is now realised that the Knowlton henge was only a single part of a larger 'sacred' prehistoric landscape, which was re-used for thousands of years, ending with the construction of the Norman church in the middle of the central henge in the 12th century AD.