It is, of course, a mere speculation, but fancy will sometimes be busy with vain surmises as to whether the present Minster is a development of the original British church, a mere grain of mustard seed, no doubt, as compared with its aftergrowth. But some primitive building did exist, for, as far back as the year 180, Beda tells us, missionaries were sent from Rome by Eleutherius at the request of the British chieftain Lucius, not for the conversion of the people, but to settle controverted points of differences as to Eastern and Western ceremonials which were disturbing the Church, and tradition speaks of twenty-eight British bishops, one for each of the greater British cities, over whom presided the Archbishops of London, York and Caerleon-on-Usk. So that the Romans probably found a Christian Church already established when Agricola took possession of Eburacum, towards the close of the first century after Christ's birth, and probably tolerated it with proud indifference for many generations until the great persecution of Diocletian in 294, when Constantius Chlorus, one of his associates in the empire, was in command, who, Eusebius says, was nevertheless most liberal and tolerant; though Beda tells us of numbers of martyrs and confessors, and how churches were thrown down, while trembling believers fled for refuge to the wilderness and the mountains. But certainly Constantius professed himself favourable to Christianity in 305, when he divided the empire with Galerius, and, after reigning for a few months, died, and his body was probably burnt and buried here. Here, at York, his son, Constantine, if not born, was saluted as Imperator by the army on his father's death, and eventually deliberately adopted the Christian faith. [Illustration: West Front]