3 Bible Verses about Walled Towns

It had a very high wall [around it], with twelve angels [stationed] at its twelve gates. The names written on the gates were those of the twelve tribes of the Israelites.

And he measured its wall [and found it to be] two hundred and sixteen feet [high], according to human measurements which the angel was using.

And the wall of the city had twelve foundation stones, and the names of the twelve apostles of the Lamb [were inscribed on them].