3 Bible Verses about Walled Towns

having also a great and high wall, with twelve gates, and at the gates twelve angels; and there were names inscribed, which are the names of the twelve tribes of the sons of Israel.

And he measured the wall of it an hundred forty four cubits according to the measure of a man, for such was that of the angel.

And the wall of the city had twelve foundations, and on them the names of the twelve apostles of the Lamb.