A canaba (plural canabae) was the Latin term for a hut or hovel and was later (from the time of Hadrian) used typically to mean a town that emerged as a civilian settlement (canabae legionis) in the vicinity of a Roman legionary fortress (castrum).
A settlement that grew up outside a smaller Roman fort was called a vicus (village, plural vici). Canabae were also often divided into vici.
Deva Victrix, or simply Deva, was a legionary fortress and town in the Roman province of Britannia on the site of the modern city of Chester. The fortress was built by the Legio II Adiutrix in the 70s AD as the Roman army advanced north against the Brigantes, and rebuilt completely over the next few decades by the Legio XX Valeria Victrix. In the early 3rd century the fortress was again rebuilt. The legion probably remained at the fortress until the late 4th or early 5th century, upon which it fell into disuse.
A civilian settlement, or canaba, grew around the fortress. Chester's Roman Amphitheatre, south-east of the fortress, is the largest-known military amphitheatre in Britain. The civilian settlement remained after the Romans departed, eventually becoming the present-day city of Chester. There were peripheral settlements around Roman Deva, including Boughton, the source of the garrison's water supply, and Handbridge, the site of a sandstone quarry and Minerva's Shrine. The shrine is the only in situ, rock-cut Roman shrine in Great Britain.
Isca, variously specified as Isca Augusta or Isca Silurum, was the site of a Roman legionary fortress and settlement or vicus, the remains of which lie beneath parts of the present-day suburban town of Caerleon in the north of the city of Newport in South Wales. The site includes Caerleon Amphitheatre and is protected by Cadw.
Headquarters of the Legion "II Augusta", which took part in the invasion under Emperor Claudius in 43, Isca is uniquely important for the study of the conquest, pacification and colonisation of Britannia by the Roman army. It was one of only three permanent legionary fortresses in later Roman Britain and, unlike the other sites at Chester and York, its archaeological remains lie relatively undisturbed beneath fields and the town of Caerleon and provide a unique opportunity to study the Roman legions in Britain. Excavations continue to unearth new discoveries; in the late 20th century a complex of very large monumental buildings outside the fortress between the River Usk and the amphitheatre was uncovered. This new area of the canabae was previously unknown.