Britannia Prima

Britannia Prima was one of the provinces of Roman Britain in existence by c. 312 AD. It was probably created as part of the administrative reforms of the Roman Emperor Diocletian after the defeat of the usurper Allectus by Constantius Chlorus in 296 AD. In the 3rd century, the Romans created Britannia Superior to separate southern Britain from militarized northern Britain. A century later, this region was further divided into four distinct provinces, namely Britannia Prima (Wales and the West Country), Britannia Secunda, Flavia Caesariensis, and Maxima Caesariensis. Hence, Britannia Prima was part of the four regions which made up the Diocese of Britain.