named Theodora, to whom coin 18 belongs.

Britain was now divided into four Diocletian provinces, to which a
fifth--Valentia--was later added when the country north of Hadrian's
wall was re-occupied. The only other event of Diocletian's reign to be
noticed is the persecution of Christians in which, according to
tradition, St. Alban lost his life at Verulam about 303.

(19-20) On May 1, 305, Diocletian and Maximian abdicated. Constantius
and Galerius now became Augusti. Trouble arose over the two vacant
Cæsarships. It was the aim of Galerius to exclude Constantine, but the
latter escaped to his father's camp at York, a few weeks before
Constantius died on July 25, 306, after a victory over the Picts and
Scots. Constantine was in power under various titles in Gaul and
Britain for five years until, in 311, when Galerius died, he began his
march on Rome, during which he is said to have had his vision of the
cross with the words [Greek: en toutô nika]. In 314 the bishops of
York, London, and some other uncertain British see attended the
Council of Arles which sat to deal with the Donatist schism. The
British Church was also represented at the Council of Nicæa, called by
Constantine in 325 to consider the Arian heresy, when the Nicene Creed
in its original form was authorized; the British vote was orthodox. It
was Constantine who in 321 first made Sunday a holiday, but whether
Christianity or Mithraism prompted him to this is doubtful.

(22-23) When Constantine the Great died in 337 the empire was divided
between his sons. Constantius II. received the east; Constans, Africa,
Italy, and the Danuvian region; Constantine II., Gaul and Spain. In
340 Constantine II. attacked Constans and was killed. Constans then
ruled the united west; it seems that Constans and Constantius II.