'Holy City' in the Bible

But the court which is outside the temple, omit, and do not measure that, for it has been given up to the Gentiles, and they shall tread under foot the Holy City for forty and two months.

And I saw the Holy City, the New Jerusalem, descending out of heaven from God, made ready like a bride adorned for her husband.

And he carried me away in the Spirit to a mountain, huge and high; and he showed me the Holy City, Jerusalem, descending out of heaven from God.

and if any man shall take away from the words of the book of this prophecy, God will take away his share in the Tree of Life, and in the Holy City, about which this book is written.