'Holy City' in the Bible

But the court that is without the temple leave out, and measure it not: for it is given to the Gentiles, and the holy city they shall tread under foot forty-two months.

And I saw the holy city, New Jerusalem, coming down out of heaven, from God, prepared as a bride adorned for her husband.

And he carried me away in spirit to a mountain, great and high, and showed me the holy city, Jerusalem, coming down out of heaven from God,

And if any one take away from the words of the book of this prophecy, God will take away his part from the tree of life, and from the holy city; which things are written in this book.