New Jerusalem in Revelation 21:1–4: God's dwelling
The city at the end of Revelation is not a political capital inside a thousand year reign. It is the New Jerusalem of the renewed creation, a people prepared for God, where God himself dwells with them.
What Does Millennium Mean in Revelation 20?
The word millennium is not in the text of Revelation 20. It is a Latin label later readers gave to the period the passage calls a thousand years, and the passage's point is that Christ's victory over the deceiver is certain.