I'm used to seeing the acronym תובב״א ("may it be rebuilt & reestablished speedily in our days, Amen") after Jerusalem, which I presume is a prayer for the building of the Third Temple.
But recently I saw it used referring to Tzfat (Safed).
- How old/prevalent is such usage?
- What exactly are we praying for? In what ways do we hope Tzfat will be built more in the future than it is currently?