<P> Saint Augustine , Bishop of Hippo Regius , was a philosopher and theologian . Augustine is one of the most important figures in the development of Western Christianity . Augustine was radically influenced by Platonism . He framed the concepts of original sin and just war as they are understood in the West . When Rome fell and the faith of many Christians was shaken , Augustine developed the concept of the Church as a spiritual City of God , distinct from the material City of Man . Augustine 's work defined the start of the medieval worldview , an outlook that was later firmly established by Pope Gregory the Great . </P>
<P> Saint Augustine , Bishop of Hippo Regius , was a philosopher and theologian . Augustine is one of the most important figures in the development of Western Christianity . Augustine was radically influenced by Platonism . He framed the concepts of original sin and just war as they are understood in the West . When Rome fell and the faith of many Christians was shaken , Augustine developed the concept of the Church as a spiritual City of God , distinct from the material City of Man . Augustine 's work defined the start of the medieval worldview , an outlook that was later firmly established by Pope Gregory the Great . </P>
who is considered the most important person in the early spread of christianity
who is considered the most important person in the early spread of christianity
Saint Augustine , Bishop of Hippo Regius
Saint Augustine , Bishop of Hippo Regius