Britannia Secunda was one of the provinces of Roman Britain in existence by c. Roman Britain refers to those parts of the island of Great Britain controlled by the Roman Empire between AD 43 and 410 312 AD and probably created as part of the administrative reforms of the Roman Emperor Diocletian by after the defeat of the usurper Allectus by Constantius Chlorus in 296 AD. Gaius Aurelius Valerius Diocletianus ( ca. December 22 244 The modern historian Timothy Barnes takes December 22 as his birthdate Allectus (died 296 was a Roman usurper - emperor in Britain and northern Gaul from 293 to 296 Flavius Valerius Constantius ( March 31 c 250&ndash July 25 306) was an emperor of the Western Roman Empire (305&ndash306 The governors of Britannia Secunda were of equestrian rank although few are known by name. Their capital was at York. York ( is an historic Walled city sited at the confluence of the rivers Ouse and Foss in North Yorkshire, England. The province is named in the Verona List and probably encompassed all of what is now northern England and possibly north Wales. The Laterculus Veronensis or Verona List is a list of Roman provinces from the times of the Roman emperors Diocletian and Constantine England is a Country which is part of the United Kingdom. Its inhabitants account for more than 83% of the total UK population whilst its mainland In 369, a new province of Valentia was created, probably from a portion of Britannia Secunda. Events By Place Roman Empire Athanaric, a Visigoth ruler fights against Valens at Isaccea. Valentia was the name of a Consular northern province of Roman Britain.