[Arthur McGowan]

There’s not a word in the gospels about “building bridges,” either.

The Pope is a conventional Lefty, in addition to be thoughtless and shallow, and also not knowing his job.

[Aliska]

There's one in Maccabees. The heavenly city in Revelation is described as a foundation built on beautiful stones and with walls.

Now why would the heavenly city need walls? I don't know if it is literal or symbolic, but walls are to keep things out. Like devils and evildoers. To protect the people inside.