Movements emerging around the time of the Protestant Reformation, but not a part of Protestantism, e.g. This often serves as a reason for exclusion of the Stone-Campbell Restoration Movement, Unitarian Universalism, Oneness Pentecostalism and other movements from Protestantism by observers.
Unitarianism continues to have a presence mainly in Transylvania, England and the United States, as well as elsewhere.
It is opposed to the hierarchical system which puts the essence and authority of the Church in an exclusive priesthood, and makes ordained priests the necessary mediators between God and the people.
Protestants who adhere to the Nicene Creed believe in three persons (God the Father, God the Son, and the Holy Spirit) as one God.
The second main principle, epitomises the main thrust of the teaching the reformers wanted to get back to, namely the direct, close, personal connection between Christ and the believer, hence the reformers' contention that their work was Christocentric.