frontier. The rank between the governors of Superior and Inferior is important. Because of the division of legions historians assume that the governor of Britannia Superior held a consular rank while his opposite in Britannia Inferior was a lower praetorian rank. This also has created confusion among historians because it has been suggested that during wartime the governor of Britannia Superior would take lead of the northern armies which would vitiate the reasons behind the split in the first place. What historians can safely agree on is that Roman Britain had very different systems of rule between the imperial reign of Severus and his successor Caracalla. Severus' influence on the split is that as Emperor he performed this same action of division by separating Roman Syria in 194 AD. However, if the division is attributed to Caracella, he did this while also readjusting the boundaries of Pannonias Superior and Pannonias Inferior in 213 or 214 AD. He divided the four total legions equally between both provinces, unlike he did in Britain. Instead two legions garrisoned Upper Britain while Lower Britain only had access to one. Although not totally a similar move, this has been extrapolated by historians as a general policy move the Roman Empire had made towards its provinces at the time. The split of Britain into upper and lower provinces demonstrates a problem that faced the Roman province. It was necessary to prevent a large army being in the hands of a single governor on the peripheries of the empires. The power base was too strong as seen in Albinus' ability to mobilize a large military in his conflict with Severus. The division created two separate capitals of Roman Britain. Londinium (present day London) was the capital of Superior, and Eboracum (present day York) was created as the capital of Britannia Inferior. Due to the unsettled Maetae population to the north of Britannia Inferior, Severus decided to rule the entire Roman Empire from Eboracum while trying to regain control of island. Buildings During Britannia Superior's time as a province, the building of fortifications was seen throughout the territory. This was not for any military purpose because there was no true offensive threat to Upper Britain. Towns were fortified at their own leisure. Verulalium and Winchester had already begun to be fortified in the first century AD, but building continued throughout the second century until at least 270 AD.