Largest late Iron Age earthwork fortification in Britain, in Richmond, Yorkshire, once called the largest 'hillfort'. It was constructed in the 1st century AD, probably in three phases. Phase I was a hillfort, which was partly demolished in Phase II (c 50-60) when a larger enclosure was added at the north. In Phase III (c 72), it was greatly enlarge to enclose the south side. Stanwick was probably a center of the Celtic Brigantes, an Iron Age tribe which always had a strong anti-Roman faction and was in rebellion between 50-70 AD. A hoard of Celtic metal objects, mainly chariot gear of the 1st century AD, was found close to the earthworks. The whole complex may have been designed to protect not only the people, but also the livestock - including horses - of a basically pastoralist economy. Some time between 69-72, Stanwick fell to the Romans and the site was abandoned. It is now thought to be an enclosed private estate or demesne containing residential compounds.