The sack of Rome by the Visigoths in 410 left Romans in a deep state of shock, and many Romans saw it as punishment for abandoning traditional Roman religion in favor of Christianity. In response to these accusations, and in order to console Christians, Augustine wrote "The City of God" as an argument for the truth of Christianity over competing religions and philosophies. He argues that Christianity was not responsible for the Sack of Rome but instead responsible for Rome's success. Even if the earthly rule of the Empire was imperiled, it was the City of God that would ultimately triumph. Augustine's focus was Heaven, a theme of many Christian works of Late Antiquity. Despite Christianity's designation as the official religion of the Empire, Augustine declared its message to be spiritual rather than political. Christianity, he argued, should be concerned with the mystical, heavenly city, the New Jerusalem, rather than with earthly politics.