I saw no temple in it, for the Lord God the Almighty and the Lamb are its temple.
  And the city has no need of the sun or of the moon to shine on it, for the glory of God has illumined it, and its lamp is the Lamb.
  The nations will walk by its light, and the kings of the earth will bring their glory into it.
  In the daytime (for there will be no night there) its gates will never be closed;
  and they will bring the glory and the honor of the nations into it;
  and nothing unclean, and no one who practices abomination and lying, shall ever come into it, but only those whose names are written in the Lamb's book of life.

(NASB) Rev 21:22-27