Diocletian was a Roman emperor from 284 to 305, who rose from his military achievements and became cavalry commander of the Emperor Carus's army. During his reign, he tried to restore the government by bringing changes. In 285 AD, after ruling the entire Empire with difficulties, he decided to split it into two. The Eastern Roman Empire and the Western Roman Empire formed and allowed a tetrarchy rule.
Catholicism was still dominant in Europe. There were many Calvinist centers in France. Most people in Norway were Catholic. England and Scotland had the most Muslim centers.
