The city of God, whose original title in Latin is De civitate Dei against pagans, that is, the city of God against the pagans, is a work written in 22 books by Augustine of Hippo that was made during his old age and throughout fifteen years, between 412 and 426. It is an apology of Christianity, in which the heavenly city is confronted with the pagan city. The numerous digressions allow the author to deal with topics of very diverse nature, such as the nature of God, martyrdom, the origin and substantiality of good and evil, sin and guilt, death, law and law, contingency and necessity, time and space, providence, destiny and history, among many other topics.

Augustine of Hippo, also known as St. Augustine (354-430), is a saint, father and doctor of the Catholic Church.

The "Doctor of Grace" was the greatest thinker of Christianity of the first millennium. Prolific author, he devoted much of his life to writing about philosophy and theology, with Confessions and The City of God his most outstanding works.