Tertullian

But we do confess that a kingdom is promised to us upon the earth, although before heaven, only in another state of existence; inasmuch as it will be after the resurrection for a thousand years in the divinely-built city of Jerusalem, "let down from heaven," which the apostle also calls "our mother from above; " and, while declaring that our poli/teuma, or citizenship, is in heaven, he predicates of it that it is really a city in heaven.