Magnae, fully Magnae Carvetiorum (Latin for "The Greats of the Carvetii"), was a Romanfort on Hadrian's Wall in northern Britain. Its ruins are now known as Carvoran Roman Fort and are located near Carvoran, Northumberland, in northern England. It is thought to have been sited with reference to the Stanegate Roman road, before the building of Hadrian's Wall, to which it is not physically attached. In fact the Vallum ditch unusually goes north of the fort, separating it from the Wall.
The fort at Carvoran is generally identified with the "Magnis" which appears both in the Ravenna Cosmography and the Notitia Dignitatum. Further evidence for the name comes from a fragmentary inscription (RIB 1825) apparently seen by William Hutchinson in 1766 but which is now lost, which referred to "numerus Magne<c>e(n)s(ium)" ("of the unit of Magn[...] ...."). The name could be a Latin nominative formMagni, or Magna, and the fort is today sometimes referred to under the name "Magna". The name is rather inappropriate for a relatively small fort, and one suggestion is that it could ultimately derive from the Celtic word maen meaning 'stone' or 'rock'.
Magnae is the location of the Roman Army Museum run by the Vindolanda Trust. Like the museum at Vindolanda, the Roman Army Museum was modernised and reopened in 2011. The museum illustrates frontier life on the northern edge of the Roman Empire. The museum displays genuine Roman artifacts including weapons and tools; life-size replicas; a 3D film showing Hadrian's Wall past and present, and a large timeline of Hadrian's Wall. There is a gallery devoted to the emperor Hadrian himself. A large gallery describes daily life in the Roman army as seen through the eyes of a team of eight auxiliary soldiers, complete with a film showing their activities. Notable exhibits include a rare surviving helmet crest.