Augustine of Hippo

Augustine was a self-centered fantasist and an earth-centered ignoramus: he was guiltily convinced that God cared about his trivial theft from some unimportant pear trees, and quite persuaded — by an analogous solipsism — that the sun revolved around the earth. He also fabricated the mad and cruel idea that the souls of unbaptized children were sent to "limbo". Who can guess the load of misery that this diseased "theory" has placed on millions of Catholic parents down the years, until its shamefaced and only partial revision by the church in our own time? Augustine of Hippo, otherwise known as St. Augustine, was the first great Christian philosopher or theologian. He was heavily influenced by Platonism, and wrote the extremely influential City of God Against the Pagans and the autobiographical Confessions, along with about a thousand other things.

It is often forgotten that Augustine was actually North African, specifically of Amazigh descent.

Christians, don't be stupid
Augustine is ripe for quote mining on all sides, due at least in part to the vast amount he wrote. But some statements key to Rationalwiki's mission include:

So even a major Christian theologian saw that biblical literalism is ridiculous—which is understandable, since literalism, in the dogmatic form we know it today, was not really a feature of Christian theology until the Protestant Reformation.

Contrary to popular opinion, however, Augustine believed in the young earth even if to be fair he was not alone in such belief in those times long before geology as we know it began to take shape. As he writes in Book 12, Chapter 10 of the City of God:

Metaphysics
In particular, he rejects the idea that the seven days were literal days, preferring instead to see them as a single instant, though he specifically rejects the contemporary non-Christian idea of deep time (in those days infinite time, over which the Earth and humanity had existed roughly unchanged). This underlies the acceptance of an old Earth by Catholics, Eastern Orthodox, and some Protestants.