The Bride of the Lamb is THE HOLY JESRUSALEM.
For it is written in Revelation 21::9-12,
"And there came unto me one of the seven angels which had the seven vials full of the seven last plagues, and talked with me, saying, Come hither, I will shew thee the bride, the Lamb's wife.
And he carried me away in the spirit to a great and high mountain, and shewed me that great city, the holy Jerusalem, descending out of heaven from God. Having the glory of God: and her light was like unto a stone most precious, even like a jasper stone, clear as crystal;
And had a wall great and high, and had twelve gates, and at the gates twelve angels, and names written thereon, which are the names of the twelve tribes of the children of Israel