What did Constantine do for Catholicism?
As the first Roman emperor to claim conversion to Christianity, Constantine played an influential role in the proclamation of the Edict of Milan in 313, which decreed tolerance for Christianity in the empire. He called the First Council of Nicaea in 325, at which the Nicene Creed was professed by Christians.
When was Catholicism founded?
Was the Catholic Church the first church?
Introduction and the Church in Britain
The Catholic Church is the oldest institution in the western world. It can trace its history back almost 2000 years.