The wall of the city had twelve foundations bearing the names of the twelve apostles of the Lamb.
We have already considered the introduction to the vision of the new Jerusalem in a more general idea of the heavenly state; we now come to the vision itself, where observe, I. The person that opened the vision to the apostle - one of the seven angels, that had the seven vials full of the seven last plagues, Rev 21:9.
Commenting on Revelation 21:9-27
And the wall of the city had twelve foundations,.... Christ is the one and only foundation of his church and people, of the covenant of grace, and of salvation; and of faith, hope, peace, and joy, and of eternal happiness, and so of this glorious state of the church; he will be the light and temple of it, the glory and safety of it; he...
Verse 14. And the wall of the city had twelve foundations. It is not said whether these foundations were twelve rows of stones placed one above another under the city, and extending round it, or whether they were twelve stones placed at intervals. The former would seem to be the most probable, as the latter would indicate comparative feebleness and liability to fall. Compare Barnes on "Re 21:19.