How did Constantine convince the Romans to become christian?

A:The Roman emperor was traditionally the head of the pagan religion, required to perform certain pagan rites annually. Instead, Constantine saw himself as the head of the Christian Church. He completely controlled the bishops and chose every bishop when a vacancy arose. His dominance over them was embodied in the statement "my will must be considered binding". Concerned at divisions in the Christian Church, Constantine called the Council of Nicaea and ensured that its agenda passed.

He granted state patronage to the Church, provided substantial stipends to its clergy and exempted them from taxes, and embarked on a campaign of building magnificent churches across the empire. The new city of Constantinople was to be a Christian city, devoid of the usual pagan temples. Along with Constantine's personal extravagance, this required the imposition of swingeing taxes on the middle classes, as the landed classes were favoured. Lactantius, a Christian who usually supported Constantine, said that as the fatal time for taxation approached, all the towns were seen in tears and grief. The scourge and the rack were used against those whose extreme poverty could not support this unjust tax. Mothers sold their children, and fathers prostituted their daughters to pay the tax.

In addition to the state patronage and support Constantine provided for the Christian Church, he began the long persecution of the pagan temples. Across the empire many were demolished on various pretexts, to make way for Christian churches. He sent Christians into the temples to plunder them for the state treasury and allowed the Church to enrich itself from some of the plunder. The temples were being weakened as the churches prospered.

Constantine the Great even commissioned the construction of several grand cathedrals.