It has been prophesied that the Old Jerusalem would be rebuilt before the coming of the Lord with the help of the Gentiles:
22 Thus saith the Lord GOD, Behold, I will lift up mine hand to the Gentiles, and set up my standard to the people: and they shall bring thy sons in their arms, and thy daughters shall be carried upon their shoulders.
23 And kings shall be thy nursing fathers, and their queens thy nursing mothers: they shall bow down to thee with their face toward the earth, and lick up the dust of thy feet; and thou shalt know that I am the LORD: for they shall not be ashamed that wait for me. (Isaiah 49:22-23)
5 But because of priestcrafts and iniquities, they at Jerusalem will stiffen their necks against him, that he be crucified.
6 Wherefore, because of their iniquities, destructions, famines, pestilences, and bloodshed shall come upon them; and they who shall not be destroyed shall be scattered among all nations.
7 But behold, thus saith the Lord God: When the day cometh that they shall believe in me, that I am Christ, then have I covenanted with their fathers that they shall be restored in the flesh, upon the earth, unto the lands of their inheritance.
8 And it shall come to pass that they shall be gathered in from their long dispersion, from the isles of the sea, and from the four parts of the earth; and the nations of the Gentiles shall be great in the eyes of me, saith God, in carrying them forth to the lands of their inheritance.
9 Yea, the kings of the Gentiles shall be nursing fathers unto them, and their queens shall become nursing mothers; wherefore, the promises of the Lord are great unto the Gentiles, for he hath spoken it, and who can dispute? (2 Nephi 10:5-9)