Roman Britain was the territory that became the Roman province of Britannia after the Roman conquest of Britain, consisting of a large part of the island of Great Britain. The occupation lasted from A
Conquests under Aulus Plautius, focused on the commercially valuable southeast of Britain
Flavia Caesariensis, sometimes known as Britannia Flavia, was one of the provinces of the Diocese of "the Britains" created during the Diocletian Reforms at the end of the 3rd century. It was probably
Roman Britain around AD 410, without speculative provincial borders.
The traditional arrangement of the late Roman provinces after Camden, placing Flavia in central England. On the basis of modern archaeology, it's known that at least Corinium was part of Britannia I.