Tertullian, son of a Roman centurion originally from North Africa, was considered among the most influential of the early Latin theologians. Although he was recognized as a firm believer in the purity of Christian doctrine and as a tireless enemy of heresy and paganism; many details of his life are open to speculation and have been reconstructed by scholars through his literary works. Because of these works, Tertullian is considered by most scholars to be one of the ancestors of early Christian customs and quite possibly the spread of early Christianity. Tertullian Tertullian was born in the ancient city of Carthage between 155 and 160 AD. Tertullian gained a higher education; including literary, rhetorical and legal training, and lived most of his life in Carthage. Tertullian is believed by most scholars to be the first theologian to develop a clear doctrine of the Trinity. Tertullian's doctrine of the Trinity was; a divine "substance" expressed in three distinct but substantially undifferentiated "persons": Father, Logos-Son and Holy Spirit. ...